Let's say I do not have what you mentioned above, what's the easier method to make the hole bigger?
Damn this sounds kinky. :embarrassed2:
Find a cheap bit like this in the size you want....
The chalk is soft enough that you can use the bit by hand... I have been free handing ours while I tweak the station that will sand and bore in 1 Step... Is a messy deal when done in volume and I have to figure out how to attach a vacuum hose to the cage or the better half is going to throw me into the street for turning part of the basement into a winter wonderland.....