Hi Joost,
As an alternative to trapped nuts in wood you could try the method I used here: [hydraraptor.blogspot.com]. I just drill a hole at right angle to the path of the bolt and fill it with molten polymorph. When it sets I drill it and let the bolt tap a thread for itself. It spreads the load into the wood quite well. Similar to a system with captive metal cylinders used on Ikea furniture.
Chris
As an alternative to trapped nuts in wood you could try the method I used here: [hydraraptor.blogspot.com]. I just drill a hole at right angle to the path of the bolt and fill it with molten polymorph. When it sets I drill it and let the bolt tap a thread for itself. It spreads the load into the wood quite well. Similar to a system with captive metal cylinders used on Ikea furniture.
Chris