Hi John Sure its possible to increase friction and widen the difference between upweight and down weight. Your BW is pretty decent as it is... actually a tad on the heavy side yes ? 40-42.5 grams by your figures. Seems to me you'd want to introduce a little friction if you'd want to change anything at all here. You are looking at 5 to 7.5 grams of friction which is low in anyones book.... tho not necessarily to be viewed as a bad thing... taste thing to a significant degree. Check your hammer and whippen centers to see if you can get anything that way first. Otherwise... I haven't really thought so much about upright touchweight myself really. Has never seemed quite worth the cost of getting all that deep into it beyond a decent regulation. I'm sure there are several approaches to increasing friction in uprights tho... it will be interesting to follow the thread. Cheers RicB For example, a Samick upright, JS 115: Downweights 40-45gr Upweights 30gr Keyleads Bass 1 lead, 2” behind balance rail Mid 1 lead at back of key Treb 2 leads at back of key My biggest question: Is it possible to widen the difference between the DW and UW (friction), or do you just shoot for an acceptable Balance Weight? What do you do about the inertia of the keys? For feel, we should have more inertia in the bass than in the treble. It should be contiguous, therefore the butt springs would have to be adjusted after the keys are leaded. I’ve considered double-leading the key (front and rear) to increase inertia in the bass without affecting the static touchweight, but would that affect repetition speed? Many more thoughts and questions on the subject, but this would be a good beginning. Thanks. John Tonyan
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