I completed this colour chart two weeks ago. The template was sent to me by a friend who also bought the set of Tombow markers. We did not manage to get the full set of markers though. I think I managed to buy 103 out of the 144 colours.
The colours blended very well on the watercolour paper I used. This is a fairly light weight watercolour paper at 180gsm. I will be making another chart on white paper. This one is off-white or cream in colour so the colours are going to be slightly different from how they appear on white paper.
In any case, if there are any of you out there who would like to have this chart, do leave me a comment with your email address. I can send the document to you. I also have the latest one with the summer collection for Twinkling H2Os. That one will need more time to colour in as I am swamped with work this weekend.