Question for GRP rod users.

For the big power combos do your rods have a solid beam or the milled out center portion? I've seen pictures of fuel rods that were solid beam and wondered if it was for strength or to save manufacturing time on rods that are changed so often?

If it is for strength at what power level do you see it being helpful?

I have talked to someone at GRP about solid beams for my next set, just curious how common they are.

 

Alky rods have the grove to get rid of reciprocating weight,less weight more power, fuel rods for extra strength