Nice to meet you and welcome to the forum. With all that experience under your belt, it'll be nice having you contribute to the forum.
I've done many tank change-outs in the past few years and, although it is very time consuming and slightly stressful, it is very rewarding when you're done. Put on some good music and have a ball!
Can't wait to see pics afterwards!
75: blood parrots, featherfin cat, emperor tetras, turquoise rainbowfish, BN plecos, japanese trapdoor; 46: WCMM, gold inca snails, ghost, bamboo & amano shrimp, kuhli loaches, rummynose & ember tetras, endlers, platies, flame gourami, guppies; 16: pygmy, peppered, loxozonus corys, otos, assassins, RCS ... ~ Research PRIOR to purchase.... ~