Plywood is lighter and more resonant than MDF, and resonance is the enemy of turntables. Also, this isn't just a plinth in the traditional sense, more like the wooden chassis of the Rega. I would take a hard pass on it, unless it was the easiest way to resurrect a badly damaged Rega. Love or hate Rega turntables I would think changing the entire chassis with something from eBay makes it not really a Rega anymore, and that alone is enough for me to avoid it..