I just bought a '97 pre-Nashville P/G tele. It is much heavier than I expected. It must weigh as much as an M1 Abrams tank. Consequently I get pain in my neck and shoulder [strap-side]. I bought a "slider" guitar strap, which fits over both shoulders and feels better. Unfortunately it slips when engaging the bender....any ideas on how to ease the pain...short of getting a new guitar?