Yeah it should fit. The Etek 2 boards are marketed as Etek 2/3 and I think the Etek 4 is also compatible also. As long as your not trying to put an Emortal board in it. You would have to alter the frame to accommodate the screen. Glad I could help you right off.
Planet Eclipse Etek
w/. Star frame, 08 Ego expansion board, Etek 3 regulator, Ego10 OOPS ASA, SLS Cure 3+ bolt w/. inserts, Zick kit, Kila detents, Ego 5/6 clamping feedneck w/. Ego 11 lever and Violent thumbwheel, PE red laser eyes, Shaft 4 barrel kit w/. all backs and fronts, both Bump pistons.
V3 Dye Rotor w/. Virtue board
114/4500 Carleton w/. Myth reg
Ego/Etek Parts FS/T