BelltwinAlex wrote:We use padlocks
Much better then welding, I agree
They can be kept loose enough not to constrict but tight enough not to slip. A very safe way to start out.
Next time visit the hardware store first and get some short hex bolts and large washers and locking nuts. when you lock your brother up, start out with the locks then when he is good an trapped, replace them with the bolts, washers and nuts. Without access to tools, he'll be in them as long as you want even though he'll keep trying (and failing) to get the bolts out. have fun --- let me know how it goes.
