To hold the centerline on the workpiece will help the device shown in the figure.
Recommend to read
TRIANGLE TRUCK
If you don't have a truck to transport the suitcase, it can be easy to make it on their own. To a wooden plank (15Х10Х360 mm) attach two small wheels, and the other two straps (5Х40Х630...
GLUE WILL NOT DRY UP
How carefully any work with glue in a tube, still the hole is clogged by dried particles. And even cover somewhere of the sunset, you will not find. Simple device eliminates these...