Hi Tom, I have used them several times in the last thirty years or so. I used to buy their “slosh fuel tank sealant” ,trim poppers and rubber mouldings. They have provided good service to me.
I have also used all these companies for aeons without experiencing any problems.
I do like the Boyce plain chrome motometre. The TCs did not have a temp gauge as standard and as such this meter would be fine as it looks period and would not necessitate drilling holes in the bulkhead and dashboard.