Al
Look at you, curating those pics! :-D
Thank you for posting those. That Varde cabinet was great--we added the rolling base when we moved to a place where I could no longer cheat with a long unicouple.
I did encounter a few considerations:
As you'll note, I designed the base such that I moved the front casters slightly out forward; this addressed the tipping issue. It never tipped, not even a bit.
The cabinet is so heavy that you likely will not have a problem with tipping, anyhow. Plus, you'll build biceps, because even with good casters, the whole assembly is not light, and will not roll particularly easily--at least, not compared to a true portable.
Oh, and about that--get the best-grade casters you can. The urethane ones from Harbor Freight worked a treat. Dinkier or even standard ones will wear from the weight, and fail fairly quickly. This is especially true if your enclosure is housing a heavy vintage machine, like a Frigidaire spin-tube or older KitchenAid.
Make sure the base is sturdy--if it bows, you'll have problems with the machine binding in the enclosure. I used solid wood, 1" thick on mine.
Also make sure the bottom is strong, flat, and smooth--it will improve the ease of installing a new machine should your tastes change (or, like me, you find something new to play with every few months).
I mounted the bottom out a bit by adding rails beneath the Varde's legs, then attached the bottom to the rails. This allows taller machines to fit. Don't be stuck with an enclosure that won't accommodate your machine! Oh, and save the cute toe-kick Ikea includes in the kit. On some machines, you'll need it; on some, you won't, or it may not fit. But when it does fit, it looks really smart.
Do yourself a favor--sand and finish the top with polyurethane. Don't let Ikea imply that mineral oil is good enough. (The stray piece of mail that lands on it will thank you.)
Lastly, you'll need to devise a place to store your unicouple. I built a cubby on the back with 1/4" plywood to do just this.
All that notwithstanding, this was the best investment we ever made--it opened up a world of possibilities for dishwashers, and liberated us from having to seek out portables. They are often limited in selection and command a premium anywhere, but in the Bay Area--with its plethora of dishwasherless and cramped quarters--especially so.