I’ve also tried balancing with the DSLR pointing down and pointing up at 45deg and found no major difference in guiding performance as the scope is orientated at various positions through a nights imaging particularly past the meridian ( centre of mass )
One of the most important part of balancing is step 9 in my procedure as it defines the balancing of the position of your DSLR , focuser and guide scope
But as Rick said try it with the DSLR underneath
My OTA has texta marks too
Cheers
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