Hi BMS (Martin?). I'm using the new pre-cut mug paper of yours and create a 21cm x 9cm template although I am giving a white border still of around 5mm to this to try and cut off the problem. Therefore the width is probably 200mm but on this mug paper this means around 25mm from the handle I guess. The image (solid colour) starts around 5mm from the top and bottom and goes the complete 200mm width. The problem though could happen on the second, third, forth mug...

The instructions for the mug press isn't that comprehensive so I am "playing it by ear" a little with regard how to insert. The picture shows the mug handle vertically when in the press but in reality when the press is down then the mug handle moves forwards and so I try and create the same amount of spacing by holding and moving the mug whilst the press comes down. I am wondering whether the mug handle is meant to rest forward towards me on the metal edge and then bring the press handle down.

The colours I am using are fairly neon pink, red, green, yellow and I find the red is the worst of the lot. This goes cloudy red at the bottom of the mug (perhaps could be the top as well depending on which end you insert first into the press I guess).

As for the oven then I've posted a couple of threads on this saying we have tried three ovens but chose mug press as the temp was consistent. Although perhaps not the pressure I am thinking?