The hardware and prop I use is listed in the instruction manual. I've had good success with ABC 3014/2 and 3016/2 both cupped up a bit...well actually a considerable amount on the 3014. Even stock it's not too bad and will put you in high 60's but if you want to run in the 70's it needs to be cupped up. Not had much luck to date with the 6719/3, but they should be usable with some tweaking. I'm sure as Scott and Will get to playing with the boats they will come up with some great suggestions... my water is way too hard for more testing right now! lol as is your's I'm sure!
Hardware is also listed in the manual...I use the round bottom extended hydro strut from Speedmaster and the straight rudder on shortest bracket (1-1/8" I believe). I like the separate rudder/struts cause you can put stuff wherever you want, but that's just me. I run my rudder on the port side, but I'm hoping someone will also try the starboard side and report back...if not, that will be one of the first things I try come soft water, cause I never got around to trying it. If you go with the combo setup, check spacing. I like my rudder C/L to be inline with the outside of the tub. That puts the rudder C/L at 2.25" from the strut C/L. Again that's just me though.
I've never tried a 6520 on anything to be honest, so I don't have a clue if it would be any good.
* Insane make one of the combo strut/rudder ... for their rigger I believe.
EDIT: actually here is one they make for their hydro...might work. I would check spacing though...the Warpath tub is only 5" wide on the OUTSIDE.
www.insaneboats.com/index.php?...3ec01a819453181
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www.insaneboats.com/index2.php...3ec01a819453181')