Using spline path operator on reversed simulation?

[d4rk3lf]

Can I create splines with Spline paths operator on particles that have been reversed with retimer?

Yes, just don't create spline paths operator on original flow, that is reversed. 
Create a new Tyflow completely, and just add 2 operators: Birth Flow, and Flow update, and pick your master flow in these 2 operators. 
It will create exact copy of your first flow just by reading from it  (with respect of retiming), and now in that second flow, just add a spline path operator.

Edit:
oops... . Tyson was faster.