The two step is normal.  It's the piston crossing over Top Dead center. . . the con rod snaps from one side to the other at TDC.  I'm not sure about the lack of pinch w/o the glow plug.  I'd have to check one of mine.</p>

My TTT PRO 46 was acquired used and has no gasket.  It's not a problem, but does lead to higher compression.</p>

Jack</p>