The shaft has plenty of tip section (5-1/2″). I would start with 1/2″ increments. That stiffen it up about 1/3 of a flex (3 cpm). Reducing the weight in the head from a standard 6 gram to 2 gram might give you another 2 cpm. that would give you half a flex stiffer playing between an R and S flex (if your playing a Regular flex now).
MPF Pro Series Trim: IR27 Hybrid Heads 0″-41″ 1/2″-40 1/2″ 1″-40″ 1 1/2″-39 1/2″ 2″ – 39″
Here’s a nice link regarding your question:
https://www.golfworks.com/oem-hybrid-guide-working-with-hybrids/a/482/
Good luck
not sure if the following will help:
https://www.golfworks.com/images/art/GolfWorksH.pdf
https://www.golfworks.com/images/art/StdLengths.pdf
The standard length chart indicates length for maltby hybrids, and the Hybrid chart indicates length for the FDI heads. The #4 FDI is 246 grams is the same as the STi-2 iron head (#4) and pretty close to the PTM (#4).
The trimming chart indicates what the manufacturer would recommend (which coincides with the links to the two charts above).
It’s seldom I follow the exact trim code as I shoot for a particular cpm, often times I’m between flexes so instead of 1/2″, I might trim 1/4″ or 3/8″. In addition I normally build to MOI specifications, so my standard lengths are based on 3/8″ intervals.
Of course, I can be a bit anal!
Hope this helps.
Thanks for your quick response. The article was super helpful. One question through regarding the IR27 tipping guides, which seem to be counter-intuitive to the article content. If you base the tipping instructions off of the head weight, which makes total sense, why does IR27 reference length not club head (2, 3, etc)?