I thought about it for sure - on the IDI pumps you can get basically the same effect from just putting a DI timing cap on (though you'd still need a suitable shim). They have an LDA cap spacer that looks interesting too...
Thanks for posting. I have cut the dynamic advance piston shorter before. This looks like a good alternative. Yes, you would need a shim of the same thickness to go under the spring to keep the advance curve the same at lower rpms. The listing says it comes with a shim, though.
M&H inc. has been working on getting more involved with the vw pumps recently. I've got a modded pump from them that is wicked! I'll be doing a write up very soon on what they will be putting together for our pumps. My eco is a blast after their pump went in. The pump pushes way more fuel than my k24 can handle. I have it turned down so I'm not smoking out my block.