When a Thunder 1 came up on here, I grabbed it.
Back in the 80s it was the bass you got if you couldn't afford a precision and the rumour was they were better made (it may well have been true).
The one I got came up really nice, sounds fantastic ... and weighs a ton.
My brother had a 1A back in the day and now has a lefty Spectrum DX.
But who can say teh Thunder 1 isn't pretty?