Cat977,
Haven't heard the term "corks" for a while... The bush guys around here use them all the time but call them ice grousers. They are simply short sections of square bar, maybe 3/4 x 1 and about 2" long, welded kind of randomly to the tops of the grousers on just about everything with steel tracks in the woods. The bits of steel are kept small to ensure penetration into ice or frozen stuff.
I've seen them for sale by the track rebuild peddlers and it seems to me they are short bits of grouser bar. But most guys just use bits of scrap steel.
I had to get some ice grousers on my old farm D6D for doing my driveway--it's cut out of a sidehill and is sloped a little to the outside edge so is dynamite to anything on tracks when things are slippery. My son went over the edge a couple of winters ago but he was on the lower end and only went down about 20' so the only casualty was his underpants.
We ended up welding a bagful of 5/8" hex nuts to every 4th grouser and that fixed the issue. We went so small because of the machine is run year round and we didn't want to tear up hayfield if we had to cross it.
Your application sounds more like a traction issue so I'm sure you are on the right path. Steering will be tougher for sure and you will rip up anything you run over, especially when turning. I'm guessing it will be tougher on steering clutches and brakes.
The BC Workers Compensation in my area dictates any tracked machine doing bush work must have single or double bar grousers--no TBG in the bush. I've got an old ex-bush excavator that is 70,000 lbs with 24" single bar grousers--its a rototiller wherever it goes, straight line or not.
Jon.