[greencactus3]

i have no idea how edible the plastics are to the hydraulic fluid,, but i think rc shocks let out too much between the disk and shock body wall.
how about the lego ones? unless the plastic gets eaten, i think itll be fine with fluids. its fine with water i knwo that much. with air and nonofficial LEGO tubes, it holds air up to 60psi ish.. that i experimented myself... get some TIGHT fitting tubes or find a way to clamp it on... although for an rc truck it might be too fragile.... and slow... unless you widened the stock holes