I “upgraded” a few of my MK5’s by drilling out the SPEC holes so they would flush better, and just went to the open system. I’m going to experiment with a dremel and see if I can elongate the holes sideways a little for even better openess.
If I had to fill regs with grease I would find something else to use and service. That just seems like a huge mess and a tedious job to do right. I wouldn’t trust a shop to do it correctly either.
@rsingler would be the only one I would trust to properly pack a SPEC reg, and I’m sure he has better things to do then to work on my old crap.
I think I read (not too long ago, actually) a post by @rsingler (IIRC) about how to refill that chamber properly. It did seem a little tedious. But, in the big picture, it adds how much time to the service? 10 or 15 minutes? And that is once every few years?
I am looking forward to paying someone else to do that for me when mine eventually need to be serviced. I don't expect to get a drop of grease on me! lol