was just looking at woods backhoes the other day for an lk3054 and saw they have a new 6.5 ft dig depth for ck20 size tractors . the boom is curved like the big cat backhoes realy cool looking rig.unfortunatly woods only make them in the smaller units so far. i think i will wait to buy one and see if they are going to make 7,8ft dig depth in the curved boom style. i am an equipment operator by trade and have run small 3 point backhoes had some problems on some with frame bolts loosening on tractor and sheard bolts.didnt have any major failures but it did show there is added stress to the machine.when i get my backhoe i will definitly get a sub frame. for the money and ease of hookup i dont want to take any chances on breaking my tractor.