Steve's PC is as far as I am concerned the ultimate for engraving, I must admit that I have'nt tried anything else, but that said, I don't need to.
I have had the tool now for around four years, Steve would know the actual dates. I have used it continuously and probably more than others for this period, I have never stripped it for cleaning as there is no need to, but maybe in the next four years
The only thing I have done is cut and re-seat the main air tube fixed to the back which can split with continuous use.
To be honest, I wouldn't be without it
Phil