Hi all! I just purchased an Ektelon Model H originally seller was asking $500 but upon looking at the machine, there looked to be some significant rust on the glide bars and some other parts. Renegotiated down, hopefully it was a good price because it also included several dozen packs of strings and many grommets. Do you guys think that this amount of rusting is really bad? Second, my concern is that upon calibrating the tension head, it does not seem to consistently lockout at the same tension. I also can't seem to get it correctly calibrated because it keeps changing even if I do not adjust the set lb. For example: set machine to 50lbs, pull calibrator through tension head and calibration unit reads 45lb. Reset the string for the unit and pull again, the unit reads 52lbs. Do it a third time and it goes back to saying 45lbs. Thinking that the calibrator is past its prime, I used an analog fish scale as well; but it had the same problem. Is there something I can adjust to fix this or will I have to send it into JC @tennis machines to get it repaired? Should I just switch my tension head/crank assembly from my older model C to this newer machine I feel like they would be compatible? I find it funny that my model c is about thirty or so years older than this 'H' but the tension head is in pristine condition and is very consistent . Also, would someone kindly point to which parts I should give the most care in alcohol cleaning tomorrow/what I shouldn't get wet, if anything? This is only my second machine and I never really had to do much for my older one because it was kept up to par, so any information is greatly appreciated. Glide bars also do not seem to "glide" well but I'm hoping the thorough cleaning tomorrow fixes it. Thanks for the help, in advance!!!