Though in my limited use of lo pro w an 87cc Stihl and 36” bars I’ve had no issues and lo pro millers in the UK and Europe are routinely using 661’s, I’ve always been really doubtful that an 880 could run the 48” GB lo pro bar - that comes in an 880 mount - without an extremely light touch or chains would snap. (The 64” seems to me too flexible a bar to even consider regardless of anything else.) But as the 880 is my most reliable saw and I’ve become addicted to the bandsaw-like smoothness of lo pro finish, I’m going to see if I can make it work. First step is to try to dramatically reduce torque and increase chain speed. So I ordered a massive 10 tooth LP sprocket from 6K in Washington. As big as can be run and still have good sprocket to bar rail transfer on an 880 tail mount. Next issue is chip clearance in lo pro chain. Goes like all blazes til 26” wide slabs or so then when 18-20 cutters in the 28-30” slab range are engaged it clogs and cuts far worse. So either full skip - which I’ve never been impressed by in .404 chains - or more preferably every other cutter pair on full comp removed would reduce cutters engaged by 1.5 or 2 times respectively for a given width and greatly improve chip clearance. Theoretically this should allow me to reduce chain load reducing chance of breakage and have fast efficient cutting. One wildcard is whether this increases load on individual cutter teeth and increases the chance of chains snapping at the cutters. Time will tell. Have to order the bar from the UK next and buy an LP chain roll to make loops from. PMX is most likely to hold up fine but it’s so expensive will experiment w a 25’ roll of Archer first to see if it’s strong enough. Pretty sure the 10 tooth sprocket will require an extra link beyond what that bar normally uses.