432MHz (70cm) Masthead System (Remote RX/TX Amp)

Following on from my 23cm Masthead system I decided G3PYE needed a similar system for 70cm.  The system will mirror the 23cm version with a TX amp and a Preamp in the box, but in addition I fitted a band pass filter for 432MHz. TX Amp John G4BAO kindly donated a UHF PA which has

70MHz (4M) Low Pass Filter

So to go along with my original 4m Tranverter System which had a decent PA I needed a LPF (Low Pass Filter) on the output.  There are lots of designs online [1, 2, 3] (thanks), take the construction methods from those sites. Above is my final LPF but when I came to making the first