Private to Zacharias & Robbie
I'll sort the wand thing out. And that's a good idea about transferring the tracking charm, I have to look into how to do that first, but until then, let me know when you need it suspending and we'll do that first. If it's only for a short time so that you can move freely, they shouldn't suspect, should they?
Memory charms aren't painful, so there's no worry there.
You've got a sample? The potion lads down in the DMLE should be able to break down the substance and work out something, but I'm not sure how much they'll be able to trace it. It's worth a try though, mate, yeah.