ICS is a nice way to go for L85’s if you can live with the weird trigger switch. I’ve done lots to mine, but if I had a proper look in the mirror all it really needed was the Warhead motor, English Kiwi Hop, and a spring. It runs a V2 gearbox for bits so they’re easy to get hold of.
I had a Star L85 which I absolutely loved, but I wore the thing out with about 250k rounds through it and a new ICS was cheaper than a complete overhaul of the Star (now Ares). The only issues I had with the Star in all of it’s time was a tappet plate and a motor, both of which I expect to go with that amount of use and abuse.