I'm sure Mighty Gem will have the exact figures to hand
Unfortunately not. It's been a long time! But, your figures seem about right as far as I can remember. There were also some temperature/time limits as well IIRC, down around minus 8 or 10. The Lynx had heated mats around the intake and hot bleed air into the intakes as well, but forget about any type of blade heating.
The most ice I ever had was about 5mm of rime after 10 minutes in some stratus, but I've been in cloud at 0/-1 and not picked up any.