£85 may be not enough with free shipping. The stem is 120cm long and is the most expensive element. The K-probe is bought separately as the one included is too short. Screws are separate, etc. £69 for the early bird is definitely not enough with free shipping. I will need to sort it out, as I only have recently started getting proper quotes.
This is a very niche product. The incumbents on the market are well over £200. Plus shipping.
I'll stick to 3D printing for customisation (colour, name on the handle, etc). It's good enough and flexible. I'm not talking to manufacturers yet, as the quantities are too small. Local suppliers have stock for the quantities I need, so no contact with the source to ask questions...