rear fill

i have 6x9

i have 4" components

the 4" comps fit the space, the 6x9's need a little fiberglass fab work to make fit. which would be better a better idea? does it matter to use components as rear fill?

to be a little more clear... 4" components would be the easier of the 2 options, as the factory speakers are 4" coaxials (would just need to flush mount tweets). the 6x9's would require a little fiberglass fab to make fit.

i basically want to know if anyone has used components as rear fill speakers....

yea people have used comonponts for rear fill before. but the subs usally take away the good that comes with the componots that why must people just say buy coaxials or just take them out.