Why long rods when pulling cranks?

[Nate926]

Hey guys I’m pretty new to crappie.com. I’m 32 now and haven’t trolled for crappie since I was probably 10-12 years old with my now late grand father.

Back then he used 6’ poles usually had 4-6 out at a time. I understand spider rigging having long poles to get the bait away from the trolling motor, but scratching my head on pulling cranks.

I plan to start trolling again my self. The boat I just bought had a bar across the back with 4 monster rod holders and two monster rod holders one on each side on the gunnels.

From what have read I plan buy the poles and spread them out as described below.

Plan to put two 14’ poles one on each side of the gunnels at a 90 degree angle.

Two 12’ poles one on each side of the outside bar at a 45 degree angle and then two 10 or two 8’ poles in the center at say 15 degree angles.

If I done this with say all 6’or 7’ poles as described above what would I lose from a fishability and performance stand point?

Thanks in advance!! P.S. I am going to move the bar and rod holders on gunnels pictured. Previous owner set them up this way.