well, the weather around here is not much to brag about, but once in a while we have some nice days for flying!
Tojeiro vs 91 4stroke... It is not many but there is a few tojeiro 90"s flying around with 70 4 stroke.
I think it will be ok with a 91 4 stroke, but thats about it. I"m not sure if I will be able to do those endless verticals, but time will show!

Happy new year!