Hi .! I have a Big problem Right Now.! Its almost IMPOSSIBLE Find 7 Strings Guitar Sets on My Country (Venezuela) Maybe One or Two and ULTRA EXPENSIVE (Like 100$ or 150$ The Set And D'Addario) The 6 Strings Sets Are more Affordable So.. i Heard Something like Use 6 Strings Sets and One Of Bass like 0.80 or 0.70 For The 7.! But Who's of Those "Combine" Wich Gauge.. For the Bass String and The Guitar Set.!?