I don't see slow turn off. The gate voltage is falling fast to about 0.4V. There's possibly a problem with very low threshold voltage FET's. With FDS4959, it isn't....the above "Complimentary pair gate driver schematic" gives a slow turn off of the FET since there is a lingering Vce(sat) voltage of the PNP BJT.
The circuit is probably used with 20KHz switching frequency,
this was the simulation switching frequency in both this and a previews thread.
eem2am, is this the switching frequency you will be using?
Alex
i am now not so keen on super-cheap, 2N3904 type discrete solutions because you get massive tolerance on the hFE parameter......and would need to test with the lower hFE tolerance....but may have difficulty actually finding one at the lower end of the hFE tolerance band.#
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