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Ti bolts are available for all the bolts on a factory split: chinese hooks, pucks, touring brackets, heel lifts. If you replace all these expect to save about 2 oz. from the board. Every little bit counts.
One could likely replace the steel bolts on Sparks with Ti as well, and save another half ounce.

any idea of an on line source for the right ti bolts?

Sure:

racebolts.com

redmist motor sports (do not remember address)

Between these two you can get what you need. Some bolts may need a little grinding to get the exact length. You can use M6 button head bolts with M6 aluminum washers for the pucks.

Ti climbing bar (1/4"?):

http://www.smallparts.com/Titanium-CP-A ... s=center-3

I am a fourth generation Rossi Jones rider and I have the 2009 model which I found to be stiff compared to most mass production freeride models, especially in the Tail. And the 2010 model (I have the 168 MW) rocks IMHO, stiff tail, rockered nose, mellow mag, really stepped it up. If the Jones split continues this progression I think it will be well worth a look. Back to stiffness, if you want really stiff freeride boards you should look into SteepWater, essentially a zero camber (slightly rockered) stick that performs at high speeds. I had my 171 Steep split by monk and am stoked. Not the lightest board, but makes me feel very comfortable in super steep and variable BC conditions at speed. Of course Nidecker makes incredibly light freeride boards. For the POW, the Lib Tech Snow Mullet BTX dominates. Had one split by Monk and ride this more than any other BC board in the quiver. Not the stiffest board, but tapered with flex appropriately distributed to be stiffer in the tail. I am sure there are production models you could choose from, but sounds like you have distinct needs, so finding the appropriate solid and having it custom split may be a direction you want to head.

BTW: Backcountry mag Snowboard review does a good job of listing weights. Here are some 2010 listings per 09/2009 issue:

Rossi Jones Mag (163cm) 7lbs 1oz
Unity Dominion (159cm) 6lbs 14oz
Winterstick TB 172 7lbs 14oz
Ride Slackcountry (161cm) 6lbs 6oz
Venture Storm Split (162cm) 8lbs 2oz
Venture Helix Split (157cm) 7lbs 12oz
Venture Euphoria Split (166cm) 8lbs 6oz
Prior AMF Split (162cm) 8lbs 6oz
Prior Khyber Split (165cm) 8lbs 8oz
Prior Spearhead Split (166cm) 8lbs 13oz
Voile Mojo Split (166cm) 8lbs 8oz.