I have read a recent post about IPD's brake bleeder tool (now on sale for 22USD).

I only have 2 jack stands.

1) Can I use the brake bleeder tool with only 2 wheels off the ground at one time. That is start doing the rear with rear wheels off the ground while front wheels are on the ground. Once reare is done, put reare back on ground, lift front off the ground and proceed with front. Is that alright to proceed like that? Or is it a requirement that all 4 wheels be off the ground at the same time?

2) Also of concern is that the brake booster. Is that true that with older mileage car there is a possibility to create a leak there if not done properly. Remember reading something about this on the Board. I believe brake fluid can leak internally passed a seal in the brake booster, so you don't see fluid missing from the reservoir or in your driveway. I think caused by lack of pressure when doing the flush. Any danger of that with the brake bleeder tool?

3) Where do you get the pressure from? In the FAQ it is mentioned you can use your spare emergency tire/wheel. Is that the way to do it?

Thanks in advance for your input.
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'89 244DL M47 158K miles