Snap-in sorbothane mount for 3030 extrusions

Not a remix, but based on Plaidbear's idea.  See: https://www.printables.com/model/83918-prusa-mk3s-anti-vibration-noise-sorbothane-feet

I couldn't find half-spheres in-stock, so went with discs.  I used four 50 Duro 1" Discs by 0.5" thick. This is adequate for my MK3s according to https://www.sorbothane.com/Data/Sites/31/edg/load-rating-calculator.html

I have two printers, so I purchased this pack with 8 discs: https://www.amazon.com/Isolate-Sorbothane-Vibration-Isolation-Circular/dp/B019O5A2EA/ref=sr_1_2?crid=1WWA7EV5SEP0I&keywords=sorbothane+disc&qid=1661285100&sprefix=sorbothane+disc%2Caps%2C203&sr=8-2#customerReviews

This mount is designed to snap into the 3030 extrusions without having to disassemble the frame. The discs self-adhere pretty well to PETG without needing any adhesive. I don't really care if they discolor my paver blocks, so I didn't bother to print anything to put under the feet. However, they do stick pretty well to the paver after coating the pavers with spray enamel. 

I printed in PETG with the .15mm Quality preset, but upped the perimeter count to 3.  They should snap into place with a little bit of force and not easily slide down the extrusions. 

I see a noticeable reduction in ghosting patterns with these feet.

Added 30mm diameter variant based on feedback.