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How to build a Z3 dual arm rest

April 2, 2000
By: Ed Bansch

This next step is for rivet nut installation ONLY! - Hole for and installation of nut rivet in lid
Drill 7/64" hole in the front of front lid (large lid arch cutouts on sides) at this exact location (see picture). Hole is on the OPPOSITE side of where the arch cutout is. That is the driver side of armrest. Look at lid and you will see where rounded edge ends and flat top begins a straight line appears. Pencil (red in picture) a straight line on top of it. Do this on front edge and side edge. From front line measure in 3/8" and place a mark and from side (non-arched side) measure in 5/8" and place a mark. Drill a 17/64" hole where marks meet. Clean away any drilling material. Load up rivet nut gun with 10/24 rivet nut and insert into hole, (put 10-24 nut on thread of arbor as block) squeeze nut in place. Note: I stripped 2 rivet nuts. (cheap rivet nuts??) The theaded arbor on rivet nut gun pulled right through. I suggest you thread arbor all the way through rivet nut and place a 10-24 nut on arbor thread to act as a block so arbor can not pull through. Be gentle but make sure nut is firmly in place. Feel and touch sort of thing!

This next step is for those NOT using rivet nut. - Hole for machine screw with nut on lid
Dril1 3/16" hole in the front of front lid (large lid arch cutouts on sides) at this exact location (see picture). Hole is on the OPPOSITE side of where the arch cutout is. That is the driver side of armrest. Look at lid and you will see where rounded edge ends and flat top begins a straight line appears. Pencil (red in picture) a straight line on top of it. Do this on front edge and side edge. From front line measure in 3/8" and place a mark and from side (non-arched side) measure in 5/8" and place a mark. Drill a 3/16" hole where marks meet. Note: If you have a 10-24 tap drill a 11/64" hole instead and tap it. This will add some strength.

Felt and Grip:
Place grip onto felt and trace width of grip. Add 1/16" to 1/8" when you cut felt with scissors. I found it better to use one continuous strip from inside grip from bolt hole around both loops and back to other side of bolt hole (approx. 7"x 1/2" ). Leave hole uncovered. Trace open sides (outside diameter) to exact size. Flip over grip and do other side. This makes a "butterfly" shape. One for each side. DO NOT COVER YET! Now place the grip on the Styrofoam and push grip into it to fill holes. My piece of foam was 1/4" thick and I placed on ground and hammered on block of wood. Did this twice. This filled the cavities in grip. Cut off any extra so foam is flush with sides of grip.

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