Paul, have a look for an alternative reducer/flattener. I think Starizona and/or Optec do one that works well with the original scopes.
In practice, you'll get better results with the reduction...unless you frequently get exceptional seeing, then it's unlikely you'd ever see a difference in detail between f/10 and f/6.3. And you'll get the reduced exposure times as a bonus...which you could use to gain extra images, and drizzle
Most of the time, we are really seeing-limited IMO