I am the diva blog there has been a challenge going on for 13 weeks so far. While I haven't done all of them, I have done some. I thought you might like to see these. I did the same Zentangle with my non-dominant and my dominant hand .. Rick and Maria from Zentangle challenged us last year sometime I think to do this ... I hadn't done it for awhile and thought I'd give it another go.
I really pressed the pen harder with my non-dominant hand and found a lack of smoothness of stroke. Funnily enough I did find doing the lines with my non-dominant hand for "Patena" (the pattern in the lower centre of the two tiles) easier. I get a bit cross-eyed when doing the diagonal lines for these type of patterns.
If you haven't already, hop on over to The Diva's blog and have a look ... lots to see.
Happy Tangling for now ... those of you who are doing a two day workshop with me in Sydney ... I'm counting the sleeps ... very exciting. Cheers Jane x