Congrats on the scope Phil , hope it serves you well and the weather is kind , you may like to join the LX90 group i think they have some tips in their file sections on checking/using/maintaining your new scope {eg: checking all the allen scres are tight , racking in your focuser in and out a number of times etc}plus recommendations on accessories.
I was thinking of getting the upgraded 2 inch visual back supplied by Petterson but i havent had indication of problems with my eyepieces {longest F-length 32mm meade SWA}. Wether its fact or not ive read that such a upgrade is only useful for SCTs 10" and higher. I ended up getting the Meade 2 inch UTHC diagonal but i wished i had brought the Williams , its a bit dearer but rates well , Frontiers sell them for 229 but are out of stock at the moment , you can import them from the US for around 210.
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