After searching Instructables and finding nothing of a similar nature I thought I would post this.
The purpose of this instructable is to show you the finished product with some basic measurements, this is a design that will need adjusting for individual needs.
Currently this is still a prototype so the next version will be more refined.
1 x sheet of 10mm plywood
2 x mini rolling pins with wooden fixed handles
base plate is 50cm long by 15cm wide
inner side plates are 15cm long x 8cm wide
Outer side plates are 15cm long by 9cm wide
after cutting all the pieces I taped all four side pieces together, marked the center of the piece and drilled a 20mm hole straight through.
The two outer pieces had a channel cut to meet the center hole so as to allow removal of the two rolling pins.
I then laid out the side pieces onto the bottom plate to roughly line up the rolling pins.
Once I was happy with the layout I marked the edges of the middle pieces, glued and tack nailed together.
I then fit the rolling pins added the outer pieces, lined up, marked attached with glue and nails.
once all four side pieces were attached I then cut a top piece to fit , it was then attached in the same way.
This prototype has need of outer side supports, it also needs the outer sides shortening in order for me to remove the rolling pins should I accidentally break the arms.
I would also finish boxing off the middle section for extra strength and aesthetics.
When I get time I will also give a really good sanding and possibly a coat of tung oil.
If required you could epoxy beads or cut channels within the rolling pins for a more specific type of massage.