Hello,
Although the Realthunder branch is very interesting, there are still times when problems arise when modifying.
So I allow myself to suggest some techniques to often avoid these problems :
- there are generally several ways to build an object, but I think it is always interesting to anticipate the choice of functions to use from a search for the geometric peculiarities of the object to be built ;
- try to simplify sketches;
- use relationships between dimensions when possible ;
- the "Extrude to face" function is very tempting, but extruding a length equal to a dimension that created the face is sometimes safer ;
- creating a reference (datum) plane linked to a face by a dimension used to create the face can be useful for attaching a sketch ...
- use rotational or translational copy functions when possible ;
- Realthunder's symmetry copy is very powerful !
My suggested solution is not perfect, but maybe it can give you some ideas ...