Hi Tom,
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How an ASI Air records the guiding data and how it could be used to diagnose RA errors is not something I am familiar with. However, if you can do some guiding with PHD2, that would provide some useful information. You can view the night's guide data with PEMPro Log Viewer , PHD2 Log Viewer or PECPrep to view the period of the errors and what mount components may be involved - worm, gearbox, etc. Addition of your extensions is most likely not the cause of poorer RA performance. But you may have jarred something else, and the worm tension may need to be reset. Analysis of guide logs can narrow this down to the mechanical component. Are you able to use PHD2?
?
John
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Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, NINA, Sequence Generator Pro and PixInsight user
