This is key will be an attempt to improve on the Swedish design of Msrs Lindholm and Wikstrom, I really like their design and it works extremely well, but I can't help thinking there isn't enough leverage for my liking and also the tensioner is a little to far from the pivot point, I have made a plan for this new key by manipulating an image of a Swedish key made to the original design, you can see it has a shorter more compact look about it.
All I have to do now is to make a key that resembles the image above :) Here below I have assembled  the handle and bearing block, the bearing block is left unshaped, as it tends to give the key a more chunky business like appearance and the nose is thicker and heavier, the spring contact bar is a new idea made from two steel leafs like the springs in an old car (see below rough cut) the contact post and rake adjuster are typically Swedish, at the moment it is front heavy but I have plans for quite a heavy brassy knob which should take care of that, all part of the Master plan  to give this key a superb action from 80 series dimensions and weighting, yet pleasant to look at as are the early Swedish keys.
And below you can see the Finished key, it is good!!  quite solid but with a hint of bounce as in the good old Amp :() the tension can be set VERY finely with the slotted pull spring idea, some fourteen turns from minimum to maximum tension, the knob is unusual as well for this design, it has a turned brass seat with a delrin finger guard and then a slender button knob on top, the brass seat supplies the final balance weight, I have fitted a spring guide which I always think looks nice on this style of key , I have spent quite a bit of time fine tuning the action of this key, there were a few minor errors crept into the design in as much as I didn't get the tensioner as close to the pivot as I'd hoped to, and next time I might get some more weight over the pivot point, but an excellent key with looks to match.