Welcome to The Fixed Gear and Single Speed freestyle forum

I got really close a couple of months back but haven't really been on the bmx for a while. I think you'll find it a fair bit harder on the 24, just cuz of the wheel size and how much more effort it is to get the wheel round. Also, the 24 will be a lot harder to hop than the bmx. I don't mean to talk you down, I think you should go for it and prove me wrong. I wouldn't mind having a bit of a barspin session with you if you like. Where did you learn? I found that riding up a faltbank and hopping 90 was the most comfortable for me.

I learnt them on the flat at low speed and over a small flatbank (like a 90 degree hop transfer) at a skatepark I used to go to (at low speed).
I know they are probably going to be a little harder on 24 as the wheels are bigger etc, but in terms of the bunnyhopping side of things i've never found that a problem as 24 inch always seemed to suit my body mechanics a lot better than being hunched over on a bmx, I used to get 3 ft or bar height just about on 24 inch, but having not done any proper high hops in a while that'll probably be down to 2/2 and a half feet at the moment until I get used to the bike again lol, i'm well up for a sesh when its built, probably 2-3 weeks away at the moment I guess?