I have a Mr. Buddy propane heater (Model MH12C) that uses the small disposable tanks and want to "convert it" to use the large 20# tanks. I see where there adapters to do this but my owners manual says not to use tanks of not more than 2.5# (75 c.i.). Would it be safe enough to do this? Would I need a pressure regulator? I also plan to run an 8-10' hose from tank to heater (for use inside an ice shanty this winter) so that I can keep tank outside. Thanx for comments/advice.