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Excellent !
Some scopes are not well setup for photography with either too short or too long on the focal point.
Too long, an extender can solve but too short is either a Barlow to extend the focal point or having to move the primary mirror up the tube. A bit more of a mission obviously.
For a minor shift out just releasing the focuser clamp on the T-Ring and sliding it back a few mm may be enough as long as it is secure. You could then put a slip ring on the T-Ring tube to make a permanent setting. I like to have a wee bit of play on the focal point.
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