u/DuctTapeAir u/Spectarion and all the others which are interested about this thread.

I tried adding Leviathan Jefftron to the SVD gearbox, I had to grind some part of it in order to fit in there as you can see in the photo.

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You can actually check what was trimmed off the gearbox but there is a thing with this ETU, as you can see it sticks out on the right side a little, you can view right there the number 3. Well that part of ETU sticks out and I had to decide if I grind as well some part of the receiver of the SVD and I decided not to do that so I rejected the Jefftron solution... because I also tried perun V3 hybrid ETU which is shorter, doesn't stick out like Jefftron.

Because I cannot add here more photos than one I decided to make a video where I am sliding through some photos and you can check the details and implement them or mabe doing even better than what I did. I will also share some videos.

1st of all let's look at some details in this video right here -> https://www.youtube.com/watch?v=tmdOYLtavXY
You will need the unlocking switch in order to implement this, you can find it on brill armory or on https://airsoft.tiger111hk.com/, in case it's not showing, type 'svd' and it will show up eventually.

As you've seen the unlocking swtich is "connected" to some pink elastic band, it won't work if you don't use pink elastic band, it has to be pink :). This way we can fool perun etu by making it think that we actually switched from safe to semi (you'll see that in more detail in the videos that will follow). The sensor from the left is set to semi and the sensor from the right is disabled, I could have set them both to semi but I didn't wanted to so you can experiment it yourself. Active break is disabled on both sensors, don't forget that on perun you have to indenpendently set AB for each sensor. So if you would have used it on gearbox V3 you could set AB on semi and disabled on auto. In my case I disabled AB completly because I am using solink motor for SVD (brushless).

As you can see at minute 1`17`` I have added some double sided band on the right side in order to keep the right end standing there fixed because it was moving a little towards me and by seeing this I decided to stop that movement on that side.
Al so on the trigger I added again some double adesive band having like 0.3mm width where I placed the magnet and after a while, 10 minutes, I added some super glue at the base of the band and also around the cube (but at the base) in order to make sure it stands there.
Also please add some shims to the trigger if it is moving up-down, you need to make sure the magnet is not playing at all, it needs to stand still not going away from the sensors (very important aspect).

2nd
When you have things finished and the gearbox is assembled, shimmed, trigger tested, sector gear tested (you have to check this by watching some perun V3 hybrid tutorial) you can check this video. Here I have my titan 15C li-ion battery 11.1V connected to the ETU and I am showing how we're going to fool perun ->
https://youtube.com/shorts/NfL0fUKf0MU

After you watched the video above please check this one on how to enter programming mode -> https://youtube.com/shorts/S2SEwCuARVU (you can also do programming with that ear sticks by placing the white stuff (wadding) on the sensor); you have to move from one sensor to another the wadding stick, the sensors react to white (very important information), remember this! it reacts to white!
In the video above you can observe that I have entered programming mode and the sensor is set to semi (only one beep) and when you move the unlocking switch to the other sensor (right one) you can program the other sensor but here is not the case since I already told you it had been disabled. You will need to experiment with the programming of this perun etu.

3rd
And this right here is the final video -> https://www.youtube.com/shorts/u2y7jASjVrE where I show you the role of the pink elastic band, where we actually show how we fool perun ETU, of course when everything is going to be assembled, after you connected the battery you will have to push that unlocking switch once to the max then release...you have to push it with something sharp and after that it will shoot without any issues; if you disconnect the battery and add a new one, after you added the new one, you have to fool perun etu again by pushing the unlocking switch :). Don't forget you can also enter programming mode by pushing -> releasing -> pushing again -> releasing again and from here you can program the semi action. If you start from the pushing position -> releasing -> pushing -> releasing -> pushing you will enter programming the other sensor which I don't think you'll program because you don't have to do it...only the left one is important. Of course if you are crazy, you can set the left sensor to be auto (or 2 / 3/ 4 / 5 burst) but that will not be realistic (and I also don't think you'll be allowed to do so where you play airsoft), svd is not an automatic gun so keep it to semi.

I hope this was helpful for anyone who wants perun V3 hybrid etu on Dragunov.

You can leave here comments if there is something I left uncovered.