I've been experimenting a bit with the wholemeal content too. I've gotten to 350 g of wholemeal flour (plus 150 g plain white) and it still tastes great. Today's loaf I made with 300 g wholemeal flour and 50 g oats (plus 150 g plain white) - both soaked overnight in the water + lemon juice - and it tasted fantastic too.
That sounds great Jabba. Do you mill the flour in the TMX?
just remember to fill your bowl with water after making dough so it doesn't set like concrete.