Gryzor beta/prototype versions?

[mgman]

Has anybody ever come across any prototype/beta versions of Gryzor? I just know there's a small demo found both alone and bundled with some versions of Combat School.

[TFM]

Face Hugger did one. It can scroll.

[mgman]

That's the XContra demo right? I've tried that one too. It's pretty neat.

But I was thinking more along the lines of a developmental build of Ocean's Gryzor. Various betas have surfaced of many old-school console games (a lot of it for systems like NES, SNES, Genesis, Game Boy, PS1, etc); maybe there's been a few for CPC games.

[Gryzor]

Can I ask why you're asking?

[TotO]

Gryzor on CPC is not already a demo version of the full Contra game? 
(missing stages and music)

[Gryzor]

When are you doing the definite version?

[mgman]

Can I ask why you're asking?

Prototypes/betas have turned up of many other Contra games, mostly the console Contra games. I've also seen some betas of home computer games turn up. A few DOS ones, a few Spectrum and also C64 betas. These things are pretty interesting; they were primarily test/preview versions but ended up creeping their way into the public. I was wondering/hoping there might be stuff like that with Amstrad CPC and its version of Gryzor.