Hi Mark,
The thing that allows Synit blanks to work a wide range of jigs is probably the thin tip diameter and the mandrel taper.
I have worked a 220g Hooker up to a 860g Skill-L and even 1kg Jazz jig with the V550 4'8". Hard work with the Jazz 1kg of course
But it can be done! And you still get reasonably good jig action across the whole range of jig weights...But of course the V550 feels more comfortable with jigs from 300-600g which is still a very wide range...
If you try to work the same range of jigs 300-600g with say blank with a larger tip diameter and slower taper like some JM blanks or a very fast actioned blank like say a calstar 760L which loads and locks quickly, I think you'd fine that the 300-600g range would be be narrowed considerably. The more parabolic blanks like the JM would probably work jigs closer to the upper 400g-600g range better while the fast calstar would work the jigs closer to 300g better....JM used to make blanks in 50g intervals...100g 150g, 200g, 250g, 400, 450g etc...perhaps because of taper they use which narrows the optimal range of jig weights?
The first thing our builder remarked when he saw the Venom blanks was that the blank had a very fine tip...and this is from a guy who has built over 600 JMs. He has used the Synit Venom blanks on many occasions now and is convinced that they can work a wider range of jigs.
Here's an interesting review on the USA Tuna 200...I think the author describes the feel of a Synit quite well...
http://www.saltyheads.com/forum/topics/new-synit-tuna-pro-review?xg_source=activity&id=6339926%3ATopic%3A3955&page=1#commentsI was playing with this blank in the shop this afternoon...when cropped in a certain pattern this blank forms the basis of the DS Seriola...comparing this blank with the V550 5'2" and 4'8" I can see why Synit says it has a lot more power reserve in the butt...this will be a very nice blank for big seriolas and doggies for sure!
cheers