I like the SpiderPro System as it works for me. However, I find the SpiderPro Plate crumble-some and it blocks my Panasonic GH1's battery door even I attach it to the narrowest width of the plate (as seen in Picture 1). If I need to change battery, I have to remove the plate and then re-attach back. Anyhow, I think the SpiderPro Plate is made for full featured DSLR cameras and should work perfectly fine. If you have a smaller camera like mine, you gotta improvised.
I always have the standard RC2 quick release plate attached to my GH1. Don't see a need to remove it and it doesn't block the battery door. There are three holes in the RC2 plate itself without any screw thread. So went down to some industrial park and find someone who could tap a quarter-twenty screw thread.
As you can see in Picture 2 and 3, I now have the Spider Pin screwed into the RC2 plate without ever to use the SpiderPro Plate and hook up to the SpiderPro Camera Holster. Two problems. Firstly, the Spider Pin is a bit long and it scratched the bottom part of the camera base. If you're not so particular about scratches at the base, good. A simple solution is to use a washer. I will probably go get one soon. Secondly, you have to remember to carry the wrench around. Oh well, it's small enuff to put inside a wallet.
In Picture 3 above, I can replace battery without ever to remove the RC2 plate or Spider Pin. If I need to use a tripod, I only need to unscrew the pin. Life is easy now.
Juz to share some tip and tricks for SpiderPro System owners or anyone who may consider this.