Honestly, this is one of the best things I've done. My last bass had awful neck dive, so I practiced sitting down 24/7. When I got my new bass, I noticed how comfortable it felt standing up, everything just fell into place. Before I thought that playing while standing was extremely awkward, and my playing was far worse that way. Now it's reversed. I find that sitting down is the one that create odd angles. I play with my bass slung low, so there's no compromises to be made here. I've been doing it for 3 months now and I've long transferred my skills.