In the link I provided earlier in this thread, there's some info, and ideas about making a homemade RCM.
As cactus has used, he went with a manual platter device. Note that he uses a clamp down device, and something like this is definitely needed when one finishes the cleaning process, and applies vacuum force to an LP. Otherwise it would be a complicaed effort/matter, both trying to turn the platter if non-motorized, and hold the LP to Platter as well when removing fluids with the vacuum.
In this link, it pictures a hand held Wand, attached to a small Vacuum of some sort, and of course while this isn't in some ways as convenient as a stationary mounted Suction Wand, I think results of Fluid removal could be virtually identical as long as one has fabricated a suitable Wand, and holds the wand perfectly parallel to the LP's surface when vacuuming.
With Machines like the VPI 16.5, you apply the fluids in a manual fashion, and this I personally prefer to an automatic, in which the end user controls the exact amount of fluids they wish to use, can also use multiple step Fluids of thier personal choice with no hassle, can manually scrub with either an appropriate Brush-Brush Pad as they desire, and of course, can let certain cleaners sit for a short while, so they can effectively do thier job, and when one feel sufficient time has passed, remove with vacuum.
Basically, almost any junk find Tunrtable could be used I suppose, heavier would be better, and if a sprung table, perhaps disabling the suspension would be an aid. Perhaps the hardest part, would be somehow modifying the spindle, or finding a way to accept some sort of Clamping-Hold Down Device. With a non-threaded Spindle, this could possibly be accomplished with some sort of hard rubber Puck, or such, with a slightly undersized hole drilled into it, so that when pushed onto the Spindle, it would remain tight, and hold the LP in place?
This Puck could also serve double duty as being a means to manually rotate the LP as you vacuum. The Platter doesn't have to be motorized, just as the Basic Nitty Gritty machines aren't Platter driven machines, but if one could maybe find a table with 16rpm speed, this would be ideal.
You'll note in the link, a Crevice Tool, with a slot cut into it, the end blocked shut, and Velvet Strips Applied, with preferably some sort of waterproof Epoxy Glue. It doesn't have to be pretty to be effective, and the important thing here I guess, would be a soft Velvet that would not harm the LP's surface.
Naturally, for the Vacuum itself, one wouldn't want to use one of those monster Shop Vacs that would pick up a Bowling Ball, and little cannister vac (perhaps preferable a little wet/dry Vac) as small as possible might be the best suited, and have more than sufficient vacuum to remove all fluids within one, or two rotations at most from the LP.
Hope this helps, and gives some of you folks some brainstorms so that you too can enjoy the benefits, and greater ease of cleaning your cherished LPs. Mark