Originally Posted by 
JohnE
				 
			You genius, Mr naut,  how come I couldn't find that on the old site,
but then you cheated by finding it out on the yank site.
This is a great revelation using a cutting board, 
however it only helps  when the rollers break, alas the welds are more of a problem. 
I think the reason i couldn't use the rollers on the front was that after the 3rd weld break/ it had been migged and sticked but still broke, the arms were a bit bent, but i two twigged that a square block was the way to go, as the new ones had square blocks in them, ( have done both doors over the past 2 years)
Oh well these new ones wil probably last forever now, will have to by another one to try this one out.
 
great work. a definate addition for the projects and tutorials.
 
john