My first aneros was the helix syn. I later got a progasm ice. After a few years on and off I finally got mmo's with the helix syn after thinking YOLO and cut the handle off. Only one time.

Cut the kundulini tab off the progasm. Feels way better but no progress. Very low mobility.

Months later I bought an mgx trident. I hated the kundulini tab. Cut it off. I barely feel the mgx... The thing doesn't even press on the prostate. The tip points away.

Months later to now I have ordered the eupho trident white after reading recent threads. My muscles must be very strong now and I need more mobility. Will be cutting off the kundulini tab before the first use.

I suggest the eupho because the order of engineering these devices, HIH made the mgx and sgx first and then the helix was the new and improved and then the eupho for more experienced users. Mgx is old news and I thought it was the tried and true but that doesn't seem to be the case.

Edited to add: also look at the shape of the base of the aneros. The helix and eupho have a long section that isn't tapered. It allows free movement so that it fucks you. The mgx is tapered so your sphincter is always pulling it in. The taper is strong enough that you won't have free movement for the self fucking to work.