Is anyone doing craft shows or fairs

For sure yes - possible.

Thank for your reply, I am a little concerned about the weight and the traveling in a van might get the machine out of alignment. After my post I did a little more reading about some having trouble assembling the machine, that concerns me a little. I would hate to spend that much on something I couldn't put together.

IF you get the Tslot bed for the machine it stabilises the system significantly. The setup and tuning is largely down the first setup and once assembled the machines are stable

the 840 with Tslot is very heavy. And not as well suited to travelling. The S420 with Tslot is very robust when travelling and easy to handle.

We carry and 840 around all over the place in a van and its still working perfectly. but its very heavy... for ease of use the S420 with Tslot would be the best mobile machine.

be extremely careful if you run the machine in public in front of people as the safety aspects are very important. The machine should really be enclosed.

how would I enclose it in a show booth?