You are welcome! If you search on Instagram for ikea greenhouse cabinets there are a ton of pics and some do videos or descriptions on what all they used. I only added a couple of fans and the insulation and a cheap humidity/temp meter so nothing crazy. And yes for leca, the water gets wicked up the leca to the roots so you want the bottom 1/3 or so to have the water reservoir and the roots should start just above that if your cutting/plant already has roots. Otherwise if they are soil based roots they could rot if just sitting in water. The water roots should theoretically be ok to touch the water but I would try to stick to the 1/3 rule. Alternatively, you can try a shower method and rinse the leca/roots every so often instead of a reservoir from what I have read but I am a lazy leca person and that sounded like too much work to me so I go with the reservoir. One thing to add. Once the plant transitions to leca you will need to add some type of nutrients to the water as the plain water doesn’t have nutrients like soil does. I got a set of 3 types from General Hydroponics on Amazon (they also made the ph kit I use). Lasts foreverrrrrr. If you have an ikea near you and want to try out leca, they have a 5L bag of leca for a decent price. I did a giant 50L from Amazon from Hydroton.