ORIGINAL: butlern
Meister Scale's 102" Me109 plans indicate 8" from the leading edge.... turns out it's supposed to be 6". 2" is significant, even for a plane that size, and I have heard that several people have lost this plane on maiden as a consequence. Does this mean that Meister Scale plans are poor quality? Some might argue yes, but I don't think so. You just should never jump in blindly. It literally only takes a few minutes to do the calculation or search a thread to find the best balance point where the model flys best.
Calculate the 25% of the MAC yourself, or research, read, and ask from those that actually have experience flying your model it takes only a few minutes to get the answer you seek. A little bit of time spent up front can save you from serious heart-break!
Nothing is perfect I suppose but I have yet to need to calculate CG for any kit or ARF I've ever owned and that's a lot of kits in 25 yrs. It's a good thing that the vast majority of kits available don't have the problem you describe because most newbies to RC can't even size batteries for their airplanes let alone calculate thier CG's. lol This CG thing has to apply to a very very small amount of aircraft for sure.