They report a weight of 3,5 - 3,7 kgs, so that is about 7,5 lbs. However, I am thinking about installing an OS 120AX iso the FX91. Any thoughts on this? With an 120AX or YS-110, you should have adequate power, even if it would get close to 8 lbs.

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I would consider a Tojeiro if I thought you could keep it under 7.5 lbs. My point in this thread was to find what's available as true 60 size pattern planes. I have a saito 100 which really can't pull more than 7.5 lbs in the upper classes.