Thank you Old Printer.
I bought my 2236 some 5 years back, not really cheap but in very nice condition (outside). It only had the well known focus problem. In the process of fixing that I did a recap of the power supply. Not really happy with the result, I modified the Z amplifier. After an accidental short between +5 and +30 on the main PCB had to repair the trigger logic and time base (4-5 ECL and TTL IC's). I finished with doing a lot of the 2236A mod's, counter repair and a fan upgrade.
It is a nice scope to service. Excellent documentation, not many special components and everything easily accessible.