Ian,
The ABCs do have allot of blade area, it helps grab but IF they prop is a bit too heavy then I'd remove some tongue (a little at a time) until it is where I am happy with it. I remove tounge on mono props and do barr cuts and tongue work on hydros. My riggers love the ABC 2816/2 (mid 70s in heat trim) If you barr cut you should heat treat!!!! Or this could happen[link=http://www.americanrcboats.com/driftwood/vids/warlock.wmv]video[/link]
Listen to the RPM come up in the corner with out the barr cut it is a flat tone around the course.
Sorry for stealing your pic Jamie
Madmodel,
Some of the early props were difficult for Jim to do and did require some (and sometimes more like allot) or work to get them right. The ABCs have been getting better over the past 5 years and the newest ones are the nicest "raw" props I have ever seen, thin blades and numbers that are easily read. The 3 + 4 blade chopper props are bad to the bone for hole shots and handling.