I am a fan of the Amphibia and yours is looking great. Good job! It's brilliant that you can totally transform the watch by changing a couple of things on it.

I am a carpenter and wear my Casio F91W. Have been for the last 4 years at least. Its a total work horse. Had a close look at it the other day and it is absolutely covered in scratches.  It would be totally disrespectful to renew it at this point. I really need to let it finish its journey!