I have just finished partially replacing some 27 year old galvanized plumbing in our home. I replaced the old pipe with the Wirsbo/Uponor complete system (Pex tubing, fittings, and expander tool) I made about 45 connections and had no leaks, however on one 3/4" MPT to 3/4" Pex adapter, I liked about 1/8" from getting the Pex over the fitting completely, and on one 1/2" Tee, I liked about 3/16". The joints have shown no signs of seeping, or leaking. The instruction manual says the maximun gap between the fitting, and tubing should be no more than a credit card thickness. My question is, in the real world how critical are my two mistakes? I can re-do these two joints, but need guidance as to "is it really necessary".