My advice to you would be to do a bit of legwork and speak directly to centre managers rather than the easy way of applying a post to a website. Perhaps even try calling centres ahead of time. They may want to ask a few questions or know who they are speaking to. It may be old fashioned, but face to face contact usually has results.
Perhaps even use spellcheck as first impressions are very important.
I had reserved my opinion given my distance from the region and I don't know Mr Leydon, but I have to back this comment from Werribee up...
You want to use a professionals equipment, you have to come across a little more professional.
From your original spelling, grammar, and just plainly incorrect words the impression I am left with does not give rise to confidence in your ability - which isn't to say you're not capable - but if it was my rear on the OH&S line or public liability there is no way I'd leave you alone with a drillpress.
I stress that it's from this post the impression is born, it was badly written.
You've then followed it up by being aggressive - you want a favour, snarling at your potential target audience is not the way to cast a good impression.
If you'd walked up to me and asked to use something of mine that exposes me to risk, I need to establish confidence that you are capable of minimising that risk or that the gain is worth the risk. When the gain is all for you, then you need to establish my trust and possibly friendship, and then I may wear the risk for you.
What have you said in your first post to show that you're capable of protecting the liable manager from risk (such as you drilling a thumb off and suing them)? Or what have you offered in return (I'd
expect you to clean up after yourself, that's not a bonus)? Offering to drill for them is a good gesture, points on that for thought, but you've just declared you're experience level is "experimenting" and that should scream "risk" to any shop who cares about their reputation and returning customers
Now I'm done with my rant and my soapbox. Please don't take this the wrong way, learn from it, improve on it, and good luck with your goal