Shim the stock VLSD centre up, will cost <$20 and there's a tutorial up in the DIY section.
I shimmed up the old VLSD out of my 32gtst and chucked it in the Stagea, was really tight for a couple of weeks but it's loosened up to the point where I barely feel it when full lock backing out of a parking space, but still lights both wheels predictably. I removed the standard shims and put a 1.49mm shim on each side of the VLSD unit.
If you're shimming the centre out of your car, you can just slap it back in.
If you're shimming a centre from another car and putting it in your housing (like I did, 32gtst VLSD centre in to Stagea open centre housing), you need to set up the backlash.. I paid my diff guy $200 to do that as I'm not geared up for it and it's my daily so didn't want to fk anything.
If you want to change ratios, you need the whole housing as the crown wheel matches the pinion gear..