? for Aftermarket Barrel for Dragon StuG IIIG

I am going to build the Dragon/DML StuG III Ausf. G, SdKfz 142/1 (#9014)
for the Stug GB this fall, and i wanted to see if i could get an AM barrel.
Now, my 'problem' is that i got an Eduard aluminum barrel for my Panther when i did that build and i LOVED it.
but Eduard does not seem to make a bbl for the Stug.

looking at greatmodels, it seems that Czech Master makes the right piece for this kit
it is described as:
1/35 czhb003 7.5cm StuK 40 L/43 Saukopf
has anyone gotten AM barrels from Czech Master?
are the muzzle brakes already on the barrel (one piece) like Eduard?
how is the quality?

and is this the right barrel for this kit?
because another manufacturer has a barrel "for the Dragon StuG III G"
that is described as 1/35 el35361 75mm StuK 40 L/48 Barrel
which makes me think that it is a different length.
also, it 'includes muzzle brake' which makes me wonder if it is separate.

of course, i can use the barrel in the box, but i liked the Eduard so much, i thought i would look around.

which is right L/48 or L/43 ?

any input would be appreciated.

anybody seen Moses?
he is a StuG man, isn't he?

thanks