I been looking at getting a 250p, I have a miller 252 now and it is a great machine but it does not have a pulse function. ( I plan to do mainly aluminum). I was wondering if any one has used the regular mig gun with the Teflon liners that Everlast sells , although I don't see them listed on the new web site. Are there feeding problems? I know there is a spool gun available but like others I agree there bulky and limit your access. A push pull gun would be great but that doest look like there will be an option for that any time soon. Also if have any inpun on the machine for aluminum in general? Thanks for your time.