I am about to get a 40+ lbs power amp. It is recommeneded by companies like Crest and QSC, that these amps be mounted using front AND rear rack rails. Do you bassists with heavy "lead sled" amps do this? My 4-space rack, a very typical abs/plywood rack with recessed handles, ball corners, etc., has no rear rails. The SWR 350 head and BBE B-Max preamp I currently have mounted in it weigh about 18 lbs and 8 lbs., respectively. I plan to keep using the BBE B-Max. Will I be asking for bent rack ears on my amp if I don't get a new rack with rear rails? I don't think installing rear rails is an option, as the plywood/abs is quite thin. Can anyone tell me what they have done and/or where they found a strong rack with front AND rear rails? Thanks!