I replaced the armboard with a solid maple one and replaced the rubber turntable platter mat with a copper one. The speed is spot on. The Mayware Formula IV tonearm is quite good. I am using a Denon DL-S1 with great results. I will be upgrading the tonearm wires, tags, and connectors.
Originally, the Luxman PD-121 reproduced mudding sounding music with the rubber mat. However, with the copper mat, this is no dog. There is great detail to the music, with a large sound stage and true pitch. Vocals and piano sound very real with great depth and texture. Complex orchestration is easily tracked. I am missing a bit of the low frequencies. However, I expect that to come to life with the new tonearm wires. I still need some extended listening. However, this is very promising.
What a great value for the price.