Hi David.
I rarely do visual...I mean who'd look thru a scope
.....except for drift align
...with a skywatcher 12.5mm reticule and a 1.25" diagonal. I have enough in focus rake for this with a little to spare.
I also had the same with my 450D and TV .8X FL reducer but I didn't space it correctly so I haven't re-tested this yet.
As others have said..in most cases the lack of in-focus rake is not a problem for most doing Astrophotography ..until they start adding a combination of filter-wheels/AO units/FL reducers and or OAGs.