I use the block of wood and a breaker bar and then dam tight and yes replace the nut after some usage , I have had the double nut thing and had them work loose , grease the splines
Farther up the lake is a lot calmer , mellow , economical , stuff has gotten silly the past year,s , should have bought 10 15 years ago but O well , fun to run up past 60mm , heading down next month , hope to get down a couple time,s this year .