Styx: A simple solution is to install some type of adjustable pressure relief valve into the vacuum system. This will allow you to achieve the highest levels of suction without actually lifting the disc off of the platter. If you don't want to get fancy, you can simply drill a hole in the vacuum hose or a plastic fitting and cover part of it with your finger. By varying how much air is sucked through the "controlled leak", you'll vary the amount of air ( suction ) at the disc. This allows you to adjust for the weight of the disc, as some discs are noticeably heavier and can sustain higher levels of suction whereas others are very light and flimsy and want to get pulled up very easily. If you have enough hose / fittings to experiment with, you might be able to find just the right sized "bleeder hole" i.e. a happy medium for all discs without the need for manual manipulation to regulate the suction. Sean
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