Well as far as being slow, I can say that with priming and trigger pulling, the two types are fairly equal. In some cases the flywheels guns are actually faster because you might only have to hold down the trigger and it will fire as fast as the next dart enters the flywheel alley.
Ubermensch: I saw you were the original flywheel guy and I saw that alot of you mods for more power involved the square 9V battery which does'nt actually give anymore power it just seems that it takes longer for the battery to die but if you go with a 9.6V battery pack it vertually almost tripples the actual power supply which really is the only major mod that can be done besides replacing the motors which i have only done to one of them.
I know these blasters are loud and I have never partaked in a nerf war, but I cant imagine that they consist of people running around being quite except for boobusing which from my understanding isnt really pratical.
Yes they are loud but only when being fired, they dont have to be on all the time, some are trigger activated and with the power upgrade it only takes a fraction of a second to reach full power for max range.
Now as far as not being able to mod them much here are a few of mine
this one is for you Ubermensch


its the mech 6 with removable magazines and motor up grade as well as the 9.6v battery upgrade
this is the DS20 or Fast and Furious


This one is pump action, so you pull the trigger to spin the flywheels and pump the grip to fire the dart, similar
to a slam fire of a raider, so as fast as you can pump as fast as the darts will shoot. This one will hit over 80 feet flat and further elevated.
This one is one of my favorites the Tommy 20




This one has the 9.6v battery up grade as well a bigger set of flywheels to allow it to fire tagger and sonic darts, a narrower barrel to increase accuracy, a swappable turret from a broken tommy 20 for faster reload time and a red dot sight for pin point 30 feet or less shots.
This one is the Quick load blaster

This one has an on/off swith and a light turns on at half trigger pull and fires at full trigger pull.
I rewired this one so that the on/off switch was no more, at half trigger pull the flywheels primed and at full trigger pull the gun fired.
This one is the Triple Mech
this gun fires darts, balls, and foam disk.
in stock form this gun would'nt even pass a dart down the barrell!
modded darts are 60 feet or more balls around 35 and disk around 25 feet.

This gun has an on/off swith as well but I replaced it with a pressure on/off that turns on when pressed and off when released, It had a false magazine well so I mounted the battery pack inside of it.

Lastly so far is my favorite. It is the Nerf Motorized Ballzooka.
This gun has the 9.6v battery pack mounted inside the gun, I had to moddify the cocking mechanism work with this adaption but it works as it should work stock. The battey pack eliminates a good amount of weight because this gun was originally powered by 6 D size batteries.

this gun stock shoot foam balls about 25 feet but with battery upgrade hits 50 feet.
I only have one video of me shooting one of the guns which is the ds20, I did that one to prove that the gun could shoot 100 feet but in the video I could only hit 86 or so feet and that was measured with a tape measurer.

I hope that this helps answer any question about the mod potential of flywheel guns, but any comments or questions about anything relating to them please feel free to ask.
Here are what they look like un-painted if anyone is not familiar with them.



