I agree with Gordon on this one, progressivly pinning my Biaxials really helped. At first I reduced it to 2 pins and left the sidebar in. I got a bit confused though, unsure whether I hadnt set the top pins, or whether I hadnt rotated them correctly. I found removing the sidebar was best, to get a better feel for the Medeco drivers. Once you have the drivers down, repin back to 2 pins, replace the sidebar and start the process again. It did feel a bit choreographed when I opened it fully pinned for the first time though, so you may want to have another on hand that you can try to pick blind with the knowledge you gained with the first lock for a true representation of what it takes to pick, and a better feeling

As you will see in the WDYPT thread, I also found getting some 4 pin payphone Biaxials to be a boon. I found mine really cheap on ebay, look for bundles, 2 of mine came bundled with 2 other low sec payphone locks and a handful of cabinet locks, but I only paid US $12 for the lot or something ridiculous! Look for the Western Electric style like this -->
http://emerald.sx/lock/Collection050117/medecopayphone1-2.jpg as these have driver pins like the regular Biaxial and have a similar feel. Other styles like this -->
http://emerald.sx/lock/Collection050117/medecopayphone3-1.jpg don't have drivers, only the cam style pins which need to be rotated and lifted in the same movement. These are still very cool, but do have a different feel. I also found that a hook with a V cut into the end, like the Peterson DCAP lifter made rotating the pins that much easier.
Best of Luck, I cant wait for my 6 pin Biaxials to arrive

adi_picker