Yeah, its made to be mounted along its full length, so some flex is expected. It's a shame they don't provide a longer mini arca. That one if definitely beefier, but, I'm totally happy the way mine came out. Glad it worked out for you.
Funny, I have a BT65-LW17 Gen. 2 and the Pod-Loc is absolutely perfect. Smooth, stays where you put it and doesn't loosen up. Now my ACCU-TAC WB-4 pivot lock stinks. I wish I could adapt the Pod-Loc on it.
From PA https://www.pyramydair.com/product/hill-ec3000-50-hour-service-kit?a=13267 https://www.pyramydair.com/product/hill-ec3000-100-hour-service-kit?a=13268
The EVO is supposed to fill the larger tanks, not the older unit from what I have herd. What to don't like about the hill is the expense rebuild kits required every 50 hours of use. Especially when you hit the 100 hour mark. That one cost more.