Probably not worth the $ on that plane. The main reason to use CF pushrods is to lose weight and/or to increase precision with less rod flex. On something like a UCD3D, the weight savings isn't going to matter much and you don't need superfine precision. If you do decide to go CF, the size of the rod you need will depend on the lenght of the rod and how you support it mid span. I'd suggest looking at the CF rods and ends sold at www.centralhobbies.com. If you are looking for a useful control upgrade, consider getting some nice coreless digitals to run your controls and use low/zero slop linkages. That will cost more than the CF rod, but the performance benifits and reusability are greater.