I just don't surf tri fins all that well...I guess I like the looser feel of a quad and decided to install quad boxes in my v2 shortboard. Really like this system, but my only concern is the gap when using fcs fins. Really didn't think about it until after the install...Iam an average surfer at best and will probably notice no difference...just a mental thing...not sure if there is something like a filler that fcs puts into there new system when using older fcs style fins...in fact wonder if they would work? I guess I could make more work and use composites and cut them down to fit in the box or cut and fill my future quads to fit the box, but then I lose one of the attributes that make the probox such a cool alternative...hoping to go the filler route...I like the idea of changing cant and able to move the fin forward or backward...btw, the system was incredibly easy to install...tho when I took the router to the board, I was a tad nervous. Gonna start a build here shortly and plan on using the probox system.
ALWAYS turn the router off and let it roll to a stop before you pull it out of the box and jig. I've used the fillers in the open boxes when riding my convertible as a thruster and as a quad, and there is absolutely no discernible difference with and without the fillers. Put an FCS fin in there and there's even less unfilled space. Don't worry about it. The amount of drag a water filled space creates is tiny compared to the drag the fin itself creates.
I'm also about to install the probox system in a custom board, do any of you put that "V" notch in the tabs of your fcs fins? Do you notice any difference in performance between the probox fins in the probox system vs fcs fins in the probox system?
No difference between two-tab FCS fins in the Probox boxes vs. FCS boxes. There is a discernible difference between Probox fins and FCS fins in the Probox boxes, but it's tough to get a sense of how much difference because there's so much difference in the fins themselves.
Yea, iam no longer worried about it...sure was an easy install...I did accidentally go down to the cloth in a very small area when sanding...easy fix. Gonna use the same system in my next build. Takes a lot of the guessing out as far as cant. Something I can play around with after install...solid system with the ability to tweak...doesn't seem popular, kinda strange...think something like this would really take off...been around for awhile tho.
IMO... It's a great system for experimentation. What I found is that once you find the best cant angle for your board, you stick with it. I also like the solid, glass-on kind of feel they give you with a full tab fin, which the Probox fins have, which are also solid glass... another good feel. Their fin selection is not as varied, but since you can use FCS in them, it really doesn't matter. What I don't like about them is the weight. The materials used to make the box need to evolve... like FCS Fusions did. When doing an install on a finished board, sand the hotcoat off, down to the cloth. Then lay fin patches down and hotcoat over the whole area. Then install your boxes and sand. This will reinforce around the box, and keep you from sanding down to the cloth when finish sanding.
