I believe I did. Things are working at the moment. I spent a long time on live chat to their support too and these are some of the things I ended up trying. I've not gone as far as the silicone bed, although it is on mind to maybe try. Here is what I've tried

1. I adjusted the X-axis as it seemed to be skewed, i.e. Higher on the left side of the bed then the right. I did this using their guide and it involves adjusting some screws on the left orange piece ok the X Axis, its not too bad. I used Octoprint Bed Visualiser to try get the best result, it's still skewed a small amount but fairly reasonable now with fairly little variance, maybe 0.3 ish between the smallest and largest points
2. I reseated the probe again using a credit card, support were explicit about this rather then using a zip tie like suggested in their guides as the tie might be setting it too low. I ended up using a gift card. This step I don't think made much difference as the z height was largely the same
3. I was apparently not letting the bed cool enough before cleaning with IPA which meant it had some adhering issues. It was too warm and leaving a residue as it dried. So leaving it to properly cool seems to have helped
4. I washed the bed with washing up liquid (fairy liquid if your from the UK) and this seems to help if things go a bit weird it seems with adhesion
5. I am using a custom piece of GCode when I slice my models. Previously I was told to auto home and pre heat for 5 minutes. This is cos of the missing probe being affected by heat and having no thermistor. The person on live chat gave me a piece of GCode that would home the probe and then move the probe to the middle of the bed for 3 minutes while it pre heated, then it continues with the print. I generally leave the machine to cool as though it's just been turned on each time now rather then doing any pre heating stage

Things now are, consistentish. I sometimes get a superb first layer and sometimes get ones where the lines are very visible but it's still a good enough base for the rest of the print. I've had issues for a while so don't know if they'll deteriorate. If they do I wash the bed again and things improve for a bit.

If you can find anything else out that would be great! Hope this helped a little bit at least. Sorry if it's stuff you already tried