"Tension has to be adjusted on a spring at the coil, as has already been pointed out." Cheers Mark Bolsius Bolsius Piano Services Canberra Australia Thanks Mark, I'll clarify the question, as you may or may not have seen the booklet Lloyd provides with the "turbo-wips." Against our best judgement, the diagram shows a pair of needle-nosed pliers gripping the spring half-way between the coil and the hook. The caption reads "place a small bend here." No doubt, the excellent instructions are from either Rick B. or Chris R., so I may contact them to see exactly what they had in mind. BTW, this is perhaps a "text-book" perfect example of what these wippens are intended for. The piano is a 1963 "B", definitive of the "accelerated action" paradigm of the day. ie: well into the tenor there are (typically) "SIX" factory installed, full-sized leads in each key, with the furthest being placed very close to the balance rail. The symptoms are typical as well, as the piano plays like a garden tractor, but weighs off right to spec!? A previous technician replaced the original "mallets" with Renner blues, perhaps in hope of shedding some lead, but no cigar. With geometry problems (as you suggested) this far out, the turbo-wips really are a welcome solution. In my evaluations, I was able to remove 4 leads @ C4, get 49D/22U, and actually weaken the assist spring (from factory setting) substantially in the process. The difference (in a single note sample) was amazing, especially when you consider the final weigh-off specs were within a gram or two of the originals! Thanks Lloyd,.. thanks all, G'day Mark B.! Mark Cramer, RPT Brandon University
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