For parts, both Larry and I like McCain's in Richardson. It's on Floyd Circle, behind TI at Central & LBJ. 972-669-0669. I've found their prices competitive, no issues with quality. They have everything you might need, from parts to o-rings to refrigerant oil to refrigerant to gauge sets - you get the idea.

To flush an evap you need to remove the expansion valve. At that point you are left with just inlet and outlet tubing to the evap. Flush it both directions, and blow it out both directions. Unfortunately, I don't know where the expansion valve resides on a 210; never had to go looking for it...

I've got a collection of temp/pressure stuff buried away somewhere; will go looking for it and post later if I find anything of value.

- JimY