Ok, small change of plan. No more dropping the unit amount after losses - it makes no sense with these tiny amounts, even less so if I believe that my approach is +EV (I do). That being said, 5% is now way too much, so I'm dropping to 4% (which is still too much, but I'm willing to take the risk at this early stage) until further notice. Bet amounts will increase every time the bankroll grows over 25 bets at the start of a day.
And since I'm prone to changing things every once in a while, I'll simply list the risk/payout amounts from now on.
And once again, the units record will never mirror the $ figure - I'm counting every bet as a 1 unit play, even as the bet amounts fluctuate.