Astro-physics Maxbright question?

Hey Roland,

I copied this from your website:

Consider these dimensions to be sure that the barrel of your accessories
will not strike the mirror.
When using 2" accessories, the depth from the top of the diagonal to the
mirror surface is 1.85".
When using 1.25" accessories, the depth from the top of the diagonal to
the mirror surface is 2.25";
our 1.25" adapter adds another 0.25" height. Remember that if you add
filters to your eyepiece
barrels, the overall length changes.
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My question is, why didn't you machine a stop into the bottom of the
barrel of the Maxbright to stop something too long from contacting the
mirror?

Al Hall