Common cause of puncture welcomer — acting limit switches rim spokes. A protective ring belts rubber, mounted on rims of plants-izgotovitelej, a little stretchy, but over time, harden and break.
A reliable replacement could be the same ring from an old inner tube from the “Lada”. They are cut on either side of the large diameter of the camera — it turns out two great strips with a width of 17 mm.
Recommend to read
WILL NOT CRACK
Paper tape glued to the joint between the door frame and the wall, protects the knot from cracking and shedding of plaster. Better to glue or PVA Bustilat. D. ZVEGINTSEV
RELIABLE STAND
To books on the shelf stood upright, their back so those are the footings of two scrap boards connected at a right angle, and a reinforcing cross member. However, on the polished surface...