A. Short answer: you can't. Meade does not offer an upgrade for the original model ETX (also known as the ETX-90RA or ETX Astro M).
But you can mount the OTA on a different mount (see the Telescope Tech Tips page) or (if still available) get a JMI computer system (see the "NGC-microMAX/NGC-MAX" on the Accessory Reviews - Miscellaneous page). Or you could sell it and by a new AT model. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.