Exactamundo. As a general rule, lighter always flies better.

9/16" shift in the CG shouldn't be terribly difficult to accomplish. If the model is "bare"...perhaps there's something you could do to remove a little weight from the tail.

Barring that, you may be able to simply shift the radio gear slightly forward. Further, as an alternative to installing dead-weight to achieve balance, perhaps a larger NiCd battery installed as far forward as is feasible would help you out.

It bears repeating however, that it is far preferable to "build in lightness"...ie: removing weight from the tail where possible.

In the end, so long as the model balances within the CG range specified on the plans, you should be fine.