My trade us a kitchen fitter, I'm wanting to make my own adaptors to connect my power tools to my dust extractors, they all have different sized ports so need multiple adaptors, also, when drilling circular holes in units for pipework, waste pipes and cables etc, I'm wanting to make circular rings to finish off the holes,I'm looking to purchase a used machine, there's plenty of realty enders on my local marketplace, are these OK as a starter machine