To date I have found the service, the quality of the parts, instructions etc. to be good bordering on very good so this is not a complaint ! But with the difficulty in fitting the springs in the Dual Extruder (echoed by a few others) as with anything there is always a different way to approach a problem. What I suggest (it may be part of an existing section ?) is a thread or maybe two on...... Tools / Additional Tools (like screwdriver type Allen keys Techniques (e.g. for fitting recessed nuts and strong springs) Preferably without going too far off topic