Audio Desk Systeme RCM - what's been your experience?

The pump solution dgarretson describes above is what I'm doing. You can see some pictures and video at this link to the VPI thread discussing this, which contain links to the information in the very long-running thread on the diyAudio forum:
http://vpiindustries.com/forum/viewtopic.php?f=9&t=2289&p=25954#p25922

The Little Giant 1-AA-OM pump has been discontinued but I was recently able to purchase a new old stock pump from this eBay seller who apparently has several:
http://www.ebay.com/itm/Little-Giant-531001-1-AA-OM-Pump-/252508771367

Let me join in here with my experience of the Audio Desk.  I have had a machine for a little over 4 years and have cleaned more than 1500 lp's. It is a very complex machine which makes it simple/great for the user but it does mean there are lots of moving parts/mechanisms.  I did have a bump in the road a while back when the lp's stopped turning and sent it in to the US Distributor (Ultra Systems).  I was bit worried as the machine was out of warranty at that point, but they found and fixed the problem
 ( needed new o-rings) and had the machine back to me within 2 weeks with all new barrels and a new filter and could not have been nicer/more professional.  I am sure that eventually the machine will break - all mechanical machines do - and at that point, I will likely get another one as I can never go back to playing lip's that aren't pristinely cleaned.

@dgarretson 
@rushton 
Thanks, both. That thread on DIY is about 230 pages long now! I've been slowly working my way through it, and have been doing a little additional research and inquiry on the side. My interest is less about cost cutting and more about improving results: a set up that allows the higher frequencies, permits the use of some sort of surfactant, is robust, takes heat into account and can address filtration of contaminants in the bath between cycles. I  can do a reagent water rinse and dry on the Monks, rather than forced air. I'm not so concerned about stacking multiple records for one cleaning cycle. I'll take a look at the VPI board as well. 
regards,
bill hart

@whart
Bill, I’ve waded through the entire diyAudio thread (it is a monster!) and also another large thread on Audio Kharma about the chemistry of the various solutions we use for cleaning. Until some of the trolls at Audio Kharma ran him off in utter frustration, a chemist (guest110) who is also an audiophile and vinyl lover, was posting answers to all sorts of questions about differing solutions for cleaning vinyl.
http://audiokarma.org/forums/index.php?threads/record-cleaning-youre-doing-it-wrong.689430/

The bottom line I came away with is: Tertigol (a detergent and surfacant) or Triton X-100 is a good way to go. BUT in very diluted amounts - less is generally better. And rinsing with Reagent grade water, then vacuuming dry, is also an excellent practice.

I’ve concluded to pursue the following set up for my ultrasonic cleaning:

Trusonik 10L - a 40khz 10-liter ultrasonic tank that seems well built and has been used for several years in the Ultrasonic V-8 setup
VinylStack Sonic Spin, with four-LP 1" spacers (because I have the larger tank)
In-line water filter for in-between-batch filtering, using bbftx’s design
Tertigol S-15-3 and S-15-9 (50-50 combination) from TALAS

I’ll use my VPI HW-17 for the rinse and vac.

I’m certainly no expert in any of this. I’m heading down an experimental path myself. But, for what it may be worth, this is what I’ve decided to try after a lot of reading and discussions elsewhere.

Best wishes in your journey! Tell us what you decide to do.

Rushton