Is it that important to have a colour scheme; brown for terra firmer and blue for the sky? Although helpful I don't believe it is critical and therefore will make loss of control more likely. Disorientation and a loss of confidence with training can be overwhelming and lethal. The effects of disorientation should never be skimped during instrument training. The human senses are useless in IMC. In my experience too many are resistant to this fact and therefore it must be proven and resolved in flying training. To the cynic the classroom is not enough.
The V tailed Bonanza is an incredibly stable aeroplane. Not to be forgotten is that it is equally stable in all attitudes. In a dive with the airspeed increasing and rapidly approaching VNE, the Bonanza can be difficult to recover from the dive to normal flight. This is not a time to experiment and training must be followed.