Just like the fabled story of Jesus who had fed thousands with a handful of fish (bait fishermen, I cried), I eventually created my own combination chart centered around using ONE (1) head, capturing the many permutations for rods in my cache ranging from 11 to 15 feet, from rod classes #7 to #10. There is a lot to take in, but if we start with isolating the relationship between the THREE (3) heads for the Zpey rod, the rhyme and reasons that pervades in this chart will become self-evident.
Using Figure 1 below, let's start with the first Zpey head: the #10/11 AFS head as-is out-of-the-box (a restriction so as to make the line returnable as an option). As mentioned in part 2, I had used the #8/9 wt S4 head as my reference to what feels as a well-matched line/ rod combination. So, this # 8/9 weight reference pointed to using the S2S3 head as-is, although now shortened to 38' for cast-ability (footnote 3). This is known as Head A, with a total weight of 613 grains. The Active-Line loads for both the S4 reference and Head A calculate near identically to 347 and 336 grains respectively.
Again, as if my casting evolution had a life of its own, I found that there was possibly a much finer tuned head that would make the same jump as if switching from an AM station to its FM equivalent. By now, my son had ran away from home after seeing me once again comatose with more foreboding mental calculations, fleeing before I woke up to find my hand unconsciously curled as if holding a tattoo pen all the while. Head C comes out - after I explained myself well enough to Social Services - a much lighter overall head by almost 50 grain than Head B. Even though the Active-Line load for both Heads B and C are almost identical - suggesting an equal load resistance - Head C now cast with a much quicker rod tip release than B, maximizing the line speed even more. And by this, this suggest to me that the weight of the Non-Active line (section C to E in Figure 1, part 2 installment) has an effect on the overall line/ rod matching.
So, now that I have a well-suited Head C for the Zpey rod (effectively a #7 US class rod), I found that the heavier Head B loads (and releases) a #8 class rod well, whilst the even heavier Head D (a variant of Head A but with identical Active Line load) works equally well with a #9 class rod (footnote 1). I now have THREE (3) weight class heads from ONE (1) head.
While the Active-Line load alone simply loads the rod, it alone does not tell the story of how the Non-Active line portion eagerly allows the rod tip to recover that maximizes lines speed. This translates to either a clean and light rod tip recovery or a sluggish and heavy one; the former being the preference for Scandi casting, the latter coming closer to a Skagit cast. The neat thing about this is the separation between the two feels was made pronounced with a simple line tweak- the shedding of 50 grains in the Non-Active Line portion (footnote 2).
Using matching in BOTH 1) Active- Line load, and 2) Non-Active-Line release, Figure 2 below shows my array of chopped sections of the S2S3 head in conjunction with tips/ polyleaders to match the different rod lengths and weights classes in my cache (footnote 3). If you could follow the local example in Figure 1 for the Zpey and Echo rods easily, you will not only be able to understand this expanded table for the expanded group of rods, but perhaps you can see a combination I have missed (I can almost hear 'Wheeeeeeee' as you pass me by with your newly activated acumen).
1) In order to do apples to apples comparison, Echo #8 and #9 weight Scandi rods were used as they are almost identical in length to the Zpey rod (measuring 12'4" and 12'6" respectively. Reference: 12'3" for Zpey rod).
2) The opposite is true for the heavier class weight #9, when compared to Head A, Head D has a more sluggish release, having 7 more grains for Active-Line load, but more importantly, 13 grains more in the Non-Active-Line load. This makes the D load more than A as the result of these two increases. The extra length is for a slightly longer #9 rod that requires a slightly longer anchor for more distance.
3) To be used with the recommended max Scandi head length in my previous blog (my on-stream experiments leads me to 3 times rod length for S2S3 max length).