The hot melt glue is not good when you have to change a component. Some factories use it with good results (acoustic). (the xover) Looks good for me.(I just can't remember if those you use are non inductance resistors?, if they say so it's oki-doki). If like you say they are "to hot and melt the belts" will be a good warning sign, anyway they sell manufactured supports just for the resistors, try a good shop for that size you use. The coils are just fine (perfect) I would put them apart because of the magnetic field, or then turn one 90 degrees.(Like one in the vertical pos. and one in the horizontal position).