I haven't got any photos but it is simple enough to do. Buy a CNC kit from China and the kit contains Spindle, VFD, a complete set of ER20 collets and a water pump. Here are links to the same parts we used, but keep in mind the VFD kit is 240V and not 110V.
Spindle Kit:
https://www.ebay.com.au/itm/333581445526?hash=item4dab00e996:g:0uwAAOSwPjNen-Ka
Bearing Rails: Link in previous post.
Lead screw:
https://www.ebay.com.au/itm/352303270979?hash=item5206e94c43:g:7iUAAOSwTvFapplq
DRO:
https://www.ebay.com.au/itm/284409031073?hash=item42381969a1:g:avMAAOSwo5ZhFvho
Keep in mind when selecting rails and the lead screw that the router only needs to move vertically about 100mm for most operations including the bit changes.
We fixed the rails to the cabinet rear panel and a board big enough to give the bearings a good spread to prevent deflection to the four bearings on the rails. The lead screw is attached to that board and a drive extension goes through the RT top deck to a suitable winder. because it comes with a complete range of collets any size spindle can be used such as a sanding bobbin and the sped wound right back via the VFD. As it is water cooled the speed does not affect the motor temperature as it would on an air cooled spindle. I posted the build thread on the here
https://www.woodworkforums.com/f20/router-table-using-linear-rails-lift-227354 but you will have to log in to see the photographs. I am surprised at how much the spindle kit prices have risen since I last bought one but I am looking at the price in AUD and not USD. Here is another completely automated RT table, perhaps the best in the world again in the Australian WW forum. It first got built without automation which was later added in the same thread. The builder wrote 6,000 lines of code during the digital conversion.
https://www.woodworkforums.com/f20/router-table-build-212190
Enjoy!