Hi Guy's I could use some help with connection devices For the main shaft (Please see attachment) I am thinking of this ....20mm Hardened Linear Optical shaft held by 2 Ball bearing blocks.The shaft will have a pulley on it and a belt drive to a motor to spin the shaft at around 2300 rpm.I wish to have a collet at the top and don't know how they mount to shafts nor do I know what collect to buy so help there would be great.The collet will need to be able to handle a range of sizes from 3mm to 10mm.At the bottom of the shaft I was going to use a windscreen wiper motor and a crank system turning an offset wheel,this will give the shaft vertical rise and fall,I need the shaft to move up and down approximately 40mm @ around 75-100 rpm. Many thanks for reading ..........Ok my file was to big to upload so here is a dropbox link ... https://www.dropbox.com/s/nh359qla57...ander.pdf?dl=0