those are both thre ready to run versions - although several people here have them - i would recommend against it. You would be better off with this version if u want a kyosho:
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXUX44&P=0
The version u showed me is NOT compatible with the kanai upgrades, even though the ebay seller says it is. The kit on ebay doesn't even have a metal spur gear.
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Here are the differerences between the two:
STANDARD MP-7.5
1) Requires engine and tuned pipe/header
2) Teflon coated shock shafts and shock bodies with hardened aluminum caps
3) Twin hole shock pistons
4) Steel spur gear
5) All differentials and gearboxes require assembly
6) Includes pilot-shaft flywheel nut
7) Hardened steel shock bushings
8) Includes rear sway bar
9) Uses bolts and nuts to attach upper camber rod ends
10) Includes set screw lockable tuned pipe mounting wire
11) Longer center rear dogbone joint
12) Threaded rod throttle and brake linkage
13) Threaded rod steering bellcrank to servo linkage
14) Hinge pins retained with set screws for lower shock ends
15) Includes front universal shafts (rear dogbones)
16) Uses low center of gravity
engine mounts
17) Smaller rotational mass flywheel
18) Chassis machined for buggy
layout only
19) White wheels and rear wing
20) Gold aluminum parts such as
shock towers, servo plate, etc.
21) Ball bearing clutch
MP-7.5 Sports
*****************
1) Includes GS21R engine and
tuned pipe with manifold
2) Uses standard aluminum shocks
3) Single hole notched in edge of pistons
4) Plastic spur gear
5) Pre-assembled differentials and
gearboxes
6) Includes standard crankshaft clutch
nut
7) Plastic shock bushings
8) No rear swaybar
9) Uses screw pins for upper camber
rod ends
10) Pipe mounting wire attaches
to chassis with screw and nut through eyelet
11) Shorter center rear dogbone joint
12) Z-bend throttle and brake linkage set
13) Z-bend steering bellcrank to servo linkage
14) Uses screw pins for lower shock end
connections
15) Standard front dogbones
16) Engine attaches directly to chassis,
higher C.G.
17) Larger flywheel specific to GS21R engine
18) Chassis is machined for recoil and
not-included two speed transmission
19) Green wheels and rear wing
20) Blue aluminum parts such as
shock towers, servo plate, etc.
21) Roller bearing clutch
