Letro and H-Drol

I have been on letro for about 2.5 weeks now at 1.75mg ED to get rid of some lumps I got from puberty and they are almost gone now so I will be tapering off next week and doing nolva for 20mg ED for 1 week and 10 mg ED for another week. How long should I wait after i’m done with the nolva this before I can start my H-drol cycle?

Cycle info:

75mg of Halo XT (Iron Labs halodrol clone) solo ED for 6 weeks

PCT, Nolva 20/20/10/10