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I decided it was time to retrofit a concrete pier into the observatory, as I was still seeing guidance disturbance when the dome was rotating and also when I was moving around in the dome. Also I kept tripping over the tripod and knocking the alignment out. Having rescued a 2.67m length of 200mm uPVC pipe from some scrub land, dug a hole, set it in concrete, filled it with concrete, and then once set, installed the Baader short pier and mounted the CGX-L and Rasa11 onto it. I also setup the voice controlled LED lights in the observatory. Really pleased how things worked out and well worth the effort as everything is so much more stable. It also feels like there is so much more room in the dome. Chapters: Day 1 --------- 00:00 Introduction The Plan 00:37 inside the dome 04:57 under the decking Getting Busy 08:30 clearing access for digging 09:00 The dig - first layer 10:25 The dig - second layer 11:17 The dig - third layer 12:03 opening up the hole bottom width / checking position 12:56 Cutting deck penetration 14:00 opening/rotating dome and pipe pass through 14:50 temporary securing pipe Day 2 --------- 15:35 base concrete pour 16:31 levelling top of pipe 17:09 Pier head securing hardware Day 3 --------- 18:55 Pipe concrete pour 20:51 Setting pier head Day 4 -------- 22:38 Progress and way forward 24:38 Remove pier head support / Rig teardown 25:13 Remove temporary pipe supports 25:30 Re-install floor cover 26:00 Remove pier head - install cap disc - refit pier head 27:55 Fit CGX-L mount 29:19 Counterweights on 29:56 Mount Rasa11 and Guide Cam / rough balance Summary and closeout ------------------------------------- 30:32 Summary and Voice Control lighting 32:09 Walk round the rig closer look 36:58 Closeout and future project ideas ---------------------------------------------------------------------------------------------------------- I upload my images to Telescopius, and you can find my profile at: https://telescopius.com/profile/dave-... My other social locations are; https://www.daves-astrophotography.com/ / daves.astrophotography / daveauld / dave_auld The main equipment I use is; Celestron CGX mount Celestron CGX-L mount Celestron Edge 11 Celestron RASA 11 Lunt LS80MTB1800C Solar Scope Bresser 8" Newtonian Bresser AR90s/500 ZWO ASI2600MC-P Colour cameras ZWO 60/280 guidescope ZWO ASI120mm guide camera ZWO ASI174mini guide camera ZWO ASI174mm planetary camera Unihedron Sky Quality Meter (SQM) NexDome Observatory #Astrophotography #DavesAstrophotography #Cyprus