I have two machines., I would like to record them with you., I would like to know approximate age or background if you have available., The 13 is pretty new relatively., d1-4 spindle- metric- taper attachment, I believe the 11 is quite old, the bed has a turn knob on the feed, does not have the three lock pin position system for the x and y feeds,- Your input would be greatly appreciated. #1-- is an 11" South Bend bed number 34261 #2 13" clc145b number 9965tkx14 Conner Santa Rosa, California