A good few years ago, I ordered a modified HW30 piston from Target Tune India (TTI). At the time WW was an agent. Anyhow, I got Will to do a tune kit for it, which proved interesting as the i/d of the new piston was marginally smaller than the standard, so an alternative spring had to be sourced. From recollection, Will got it up to about 7.5ft/lbs in .177". It was a sweet shooter, but in the end, I sold it as I had too many HW30's (I was buying project HW30's from Oakhampton Guns at £40 a pop and ended up with way too many) and my logic was, the tuned '30 would sell better and the HW30 is such a sweet shooter anyway, I could experiment myself.
Sadly I believe TTI was on a slippery slope after the death of the original owner (some comments even suggested there were issues before) and I believe they no longer trade.

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