I just finished a US.60 and with all the shaping , used one of these .
http://www3.towerhobbies.com/cgi-bin...LXAA64&P=0 , Wished I bought one 10 builds ago . Just takes a little at a time ,but some much faster than sanding .
I would recommend taking out the last bay of ribs on the 4 Star and go with a Sullivan tailwheel . It also does,nt knife egde well and would add to the rudder . I,m going to build one this winter with counter balances added. Fly mine with a Saito .56 and it,s perfect for this plane.
Been eyeing the Hog Bipe, I have a SkyBolt , but one can not have enough bipes.

Oh yeah , I need to build a LT 40 too. Whew I better get busy.</p>