The biggest problem with this series of scope is cathode poisoning on the CRT. First symptom is the text gets soft
My recommendation is to get a replacement LCD display from Simcomm labs aka newscope kits are about $650 and take about 4H to install you also reduce weight by about 10 pounds. I They also sell through the well known auction site.
Since so many adjustments are dependent on X CRT divisions either in the X or Y dimensions a solid display system is a must. Also the LCD display adds value to the instrument as it makes it equivalent to a EC series of the same scope with the same multicolor display.
