No. None of the kits will fit.
An E-trigger is the Tippmann Board, not an actual trigger.
No. The trigger assembly for the a5 is set up very different from the 98 custom.
Yes, just simply buy a double trigger and double trigger guard, open up your marker, remove and replace the old trigger and trigger guard.
No, they fit in the same place. Besides that, putting them both on wold defeat the purpose of either of them and would not increase speed. The E-grip is supposed to use battery to make automatic fire easy, where the response trigger allows you to use a form of auto without needing a battery by using Co2.
No. they have two different receivers.
No, the mounting screws are different, it will not fit the 98. There is a 98/USarmy cyclone feed made that will fit.
98? or 98 custom? I don't think you can put one on the old 98s or the customs actually there might be a special made e-trigger for the 98 customs but the reason why I say you cant is because if you look at a 98 custom or 98's inside theres no where really for the whole trigger to come off whereas the A5 or X7 the entire trigger system comes off handel, trigger, firing modes, everything its basically half of the back part of the gun coming off
Not unless you get the handle adapter and drill a hole in the carry handle.
You unscrew the screw on top of them, drop in the new ones, and put the screw back.
First you want to remove the barrel, tank and hopper. then you need to take out the pins and slide out the rear assembly, as well as disconnecting the tombstone and the trigger assembly. Then you need to put a small amount of oil on all of the o rings, clean out any paint or grease, then reassemble it.
It depends on the mods you put on it (if any). If it still has all stock parts (no mods) then a 5 dollar hopper is fine as long as it's sturdy. If you put a anything on it to increase the bps (fire rate) such as an e-trigger or a WAS board, then you may want to find a good battery operated cyclone feed hopper.