Posted these photos in another thread as well.. Sample panel to get the idea across.

Seams:


All of the parts:


With seam allowance:


Split out to show the three pattern pieces:



Patterns cut out of chipboard on the laser:


Finished part:

The chipboard patterns:

Sample:

For stuff like this, I find it much faster to draw it in CAD and cut chipboard patterns on the laser. For this example the blue is the seam:


The red is the outer band and the green is the insert. With 1/2 seam allowance. So, there's 1" between the two:


The final patterns with seam allowance for each part:

Richpiece will get you a quote quick. If I remember correctly, the machine I looked at was around $40k.

I draw seat inserts and such in CAD and make a chipboard template for each part on the laser. It's much faster than drawing by hand. Really works well for flat sections. The rest, I do the old fashioned way to make the pattern. If I'm doing a lot of the same seat, I'll digitize the pattern and cut chipboard templates on the laser. It's a great way to work.

The trick I've learned is you need to offset the outside band's radius by your seam allowance. I'll use 1/2" to make it easy. So you have a 3" radius seam. The insert will be 1/2" larger. The band will also 1/2" larger. This means there's 1" total overlap (2 times the seam allowance) between the two pieces. I find it works well to use staples to hold everything together while you sew it, if you are having problems with it all lining up.

If you still need it, I have a few rolls of Rave Black Ink.

I've always been happy with Gregg at Keystone Sewing in Philly.

I have the same gun as Joe. I bought it from Perfect Fit-McDonald. They sell the gun setup for adhesive. I also only spray weldwood. I bought the pot used. Rebuild kits for the old regulators were easy to find online for a couple bucks.

I have a Seiko split needle bar post bed machine. Well worth the expense.



I also have Consew 339RB in 1/4 and 3/8 gauge. Again, very happy to have them in the shop.

If it's in the budget, I highly recommend either a Durkopp M-Type or for a LOT less, the Juki LU-2810A-7. It has a high step mode that is selectable at the push of a button to high-step the foot, along with auto back tack and thread trimmer. Well worth the expense. It will dramatically improve your output.