Vernon - you may be interested in
this article, stressing the importance of quick and thorough chilling, and scrupulous attention to detail in hygene, to avoid bone sour.
I must say, 8C sounds a little bit high.
Although Morton's are advising using a different brew to inject from that used for immersion, I think that's a refinement for later... But the business of turning it every couple of days and stirring the brine, (which Morton's seem to call 'overhauling'), is stressed by Erlandson, and others.
You seem to have kit for brine injection. I think its conventional to inject brine to about 10% of the ham's weight, if you are going to inject. So that'd be approx 100ml per kg.
Smoking. I note that you have said that you were pleased with the results from cold smoking bacon for just 6 hours.
I also note that Erlandson's suggestion for bacon is cold (24/26C) smoking for 24 hours ("mild") to 7 days ("stronger").
I mention this to provide an opportunity to cross-calibrate between his smoking technique and yours, so that you can scale appropriately his advice of ham smoking temperatures of 26/21C and times of 48 hours to six weeks (which need not be continuous). Indeed he advocates starting to eat it while it is still part smoked...