I have a 27 hp mudbuddy longtail I beleive its a 2003 or 2004. Was tring to disassemble it and noticed some one tack welded the driveshaft to the the yoke, don't beleive this was done by the factory but wanted to ask. The upper bearing and seal housing: disassembly? Lower bearing removal? I read the instruction manual online but not very helpful. Any suggestion? The lower bearing is a roller with no inner race and upper looks to be a bearing assembly any tips on disassembly? I don't want to tear the lower unit up