Wall drilling guide and dust extractor

After using various drilling dust extractors for some time, i wanted something to keep the drillbit in place when drilling wall tiles (and walls in general). I made a drilling guide that can be used with usual impact drills (i did not tested it with a hammer drill, but i don't think the suction will be enough to keep the guide stuck on the wall with the increased impact force). It has a neck of 30mm that allow the use of a vacuum cleaner, for suction against the wall and dust removal. Also, the two windows allow placing the drillbit tip at the precise position for drilling.
I uploaded multiple size guides because adjusting the center hole by drilling can remove the guide walls, unless you choose a higher infill percentage. If you use it often, with multiple drill diameters, you can print the largest one and the bushings for other diameters and then replace them when needed. A little bit of grease will ensure a longer usage for the guide and bushings.
I used supports only for the cent