Your { 40 x (10mg) tamox tabs} shoud be just fine for your Pulse PCT.
For my 8 week 30mg SD EOD Tue, Thur, Sat Pulses.
I did a mini PCT for 2 weeks with SERM Tamoxifen, 20mg for 2 days, 10mg for 4 days, 5mg for 8 days and use PCT Assist just 2 caps a day.
Maybe I could get away with no PCT and...