Hi there, Egg on Leggs. I have to admit, that is an interesting moniker, and fun! Yes, you may find yourself re-doing some of the HengLong Sherman, depending on the version and other factors. Has there been a specific problem so far, or is it just that you want to make the M4 more accurate or more durable? Please do ask questions as you want and let us know about your skills (or, like me, lack thereof).
EoL Hi,Welcome to the Forum
A very accurate description of any new Tank but perhaps it is just as well because only learning how to open the thing when a fault develops is too late.
Where in the world are you?
Please do enjoy this place and ask lots of questions.