Downsizing, need opinions

[Biotech]

We are doing a renovation and I have to downsize my 150gal FOWLR to a 75gal. I am thinking if I transfer some of the sands, most of the LR from the old to the new tank, and fill the new tank completely with water from the old tank, I should not have to recycle the new tank. Am I crazy to think like this? What do you guys think?

I have the old tank for more than 6 years, so it is well seasoned!