Is there any truth to once you use a brand of tape for the first time, than stick to that brand, otherwise you can have problems. What are the better tapes (if any) to use on a GL2?

Excellence guidance available in this community by using the SEARCH feature on 'tapes' or by selecting "The Long Black Line" forum listed on the DVi Community home page.

The knowledge already recorded for your reading is really worth your time. Then, if you have questions that aren't answered, there are some pros here that can tell you more than you want to know about tape. Just like the PGA slogan...These Guys are Good!

Yes, there is. Read all about it in this section of the forum. This is well-trod ground.