Phase shifted interlaced episode with normal interlaced intro. TFM+QTGMC

[LaserBones]

I'm trying to encode a series that mostly has phase shifter interlacing at 25fps throughout the episode, but the intro is normal interlacing that needs to be bobbed at 50fps.

Can I somehow deinterlace the intro and then duplicate the phase shifted frame after frame matching with TFM?

I'm thinking something similar to the script below but without the fps divisor and with the TFM parts duplicating their frames after frame matching.

D = QTGMC(Preset="slow", FPSDivisor=2, EdiThreads=3)
TFM(slow=2, cthresh=4, mi=0, pp=7, clip2=D)

[jagabo]

for 50 fps:

Q = Trim(x,y).QTGMC()
T = Trim(y+1,z).TFM().SelectEvery(1,0,0)
Q+T

for 25 fps:

Q = Trim(x,y).QTGMC(FPSDivisor=2)
T = Trim(y+1,z).TFM()
Q+T