Re: LP 50's mod + spin-a-split
You can't really do the 50's mod on an LP. Or any dual-volume guitar, for that matter. The problem is, the 50's mod connects the tone control to the output jack rather than the pickup. So you'ld just have two tone controls on the whole guitar. They wouldn't be for neck and bridge.
Now, if you wanted to go with a single master tone control, and use the other hole for something else, that would work. (Like a spin-a-split.)