What are the best sounding DIY power cables and connections, opinions please ?

Hey Select, I have been making my own cables for 40 years. First of all equipment location is critical. You want to keep your power amp or amps far away from your low level equipment. Mono amps next to the speakers are ultimate. You want to keep the speaker cables as short as possible. I use Kimber 12TC which you can buy in 50 foot rolls for $1700. I agreed to make cables for several  Hi Fi friends which covered the cost and left me 10 feet of cable which is exactly what I needed. I use WBT 0610 Ag bananas to terminate the 12TC. Heat shrink is use to tidy things up. I do not use a cover as I think the cable is sharp. There are less expensive versions of this extremely low induction cable. The more power you have the larger the gauge you want to use. I use 10 gauge twisted three conductor with a foil shield cable for power cords. I terminate with Wattgate AU gold AC plugs. The cables are built to length, as short as possible the shield is connected only at the wall ground. For audio and digital cables I use Canare DA 206 cable with their RCAP-C RCAs and Neutric Gold Canon connectors. The shields are always connected at the proximal end only with RCAs. All cables are cut to length and the equipment is positioned to minimize cable lengths with the exception of the amplifiers. I do agree with keeping Lt and Rt channels at equal length even though it probably does not make much difference.  DA 206 can be run over 1000 feet without degradation of a digital signal. I have run double blinded tests with several other very expensive cables and no panel was able to tell the difference. Some of the other cables were better looking and their companies are much better at marketing than I am. But, the theory that if it costs more it must be better is seriously flawed when it comes to Hi Fi equipment and accessories. I could give a hoot what something looks like. I only care about performance and durability.