I left a query in the Midlength room but thought I would raise a separate topic.
I have been looking for a new board a bit different from what I have been riding (which hasn't been much lately) and started to look at quads in midlength and longboards. I haven't ridden a whole lot of quads but don't mind the different feel they provide. I'm not a fan of 2+1 as i don't, can't and not interested in nose riding. I know others won't agree with this.
This led to a look at twin fins. I have never ridden a twin fin and not sure if they are a gimmick made popular by Toryn Martyn and Mikey February (these guys could make a fence paling look good on a wave) or if they have some design justification.
I am not familiar with the local Gold Coast shapers that specialize in quads and twins? Most shapers can put the extra fin box in a board that was otherwise designed as a thruster/2+1. The Tollhurst range features a lot of quads but apart from being expensive, I believe they are all made OS. They are probably great boards but not in stock anywhere from what I can see.
What are others experience with either quads or twin fins in longer boards?
Cheers

PS: My current surfing ability doesn't really justify getting over sensitive about technical design but it is fun thinking about it. Now I am getting closer to 60 than 50, I have really noticed a slow down and stiffness in my popup, reduced wave count due to some weight gain and reduced fitness/strength. Particularly as I haven't been surfing as much as I would like.