I like my 3W 80xi over my ZDZ 80 RV just because I find that it's more user friendly and does not flood as easy.
The little Allen key that holds the spark plug boot on the ZDZ almost lost me a plane when it came loose at a bad time. Yes I do lock tight it on but it still slipped off. Once was to much for me. I drilled out a second screw to be safe, not a big deal but why not go with a clip on arrangement. Better setup I think.
Also I wish ZDZ would do away with 4mm prop bolts and go with 5mm. A little more robust and don't strip the heads so often[:@]
Good engineering, maybe.
I wish 3W would make a better mounting setup for the 80xi. not much clearance and having to add a mounting plate is kind of pointless, but I got it done without having to use it, but it was a pain all the same.
A motor that has caused me no grief, my little Brison 2.4
Just my observations.