Don't apologise, Raxo.
This is just a friendly discussion, you know.
I don't know how important this is, but at the time of this song the Beatles were still using two-track tape for their recordings.So I imagine the amount of studio skulduggery was a bit limited.
For my money it's take five plus overdubs from take nine.
I don't see why you think John is playing bass guitar on this.Did he even have a bass guitar at the time?Remember Paul's was left-handed so John couldn't borrow it.
What I'm saying about Lewisohn is that he's the best source we've got and all of these sites that put up often conflicting information don't impress me at all since quite often they're just repeating hearsay.
You seem to be prepared to accept that maybe Paul IS on there so I'll bid you good night (it's midnight here) and call it a day!

Well, I was saying goodbye with a joke   ... not apolozing at all: it's friendly discussion (and an interesting one -take a look at reply 13-) ...

... they could made magic with those old machines and when they used four-tracks ... well, you already know that, ... and what I was suggesting about free space it's not imposible but something Sir George used to do for vocals and solo parts in their first years.

I don't think it's John playing the bass (but if it was he, he would have had the same problems with Paul's bass as George a couple of years later, ... after all, for a novice player one or two strings of the bass it's all he would have needed) ... it's only a posible explanation to that poor hidden bass part.

I don't know if it's Paul ... I just listen to the track and read some sources and then I can't understand why that bass is there and in the form it is.

I'd sum up in this double question: Why some people say that George and Paul were not on this track and why the instruments seem to tell me that not all of them played  or sang here?      

Goodnight, zipp. Be saved.  

Can anybody tell if Mark says Something about all this?

"Another infamous discrepancy involves Eric Clapton. It's well known that Eric played the lead guitar solo on While My Guitar Gently Weeps, after George became unhappy with not being able to get the part the way he wanted it. But it's not well known that according to George, Eric also played the solo on Something, which is not how it appears on the studio logs. George reportedly took Eric into the studio one night and had him track the solo. George himself told this story on a radio interview."

From here: http://musicmoz.org/Bands_and_Artists/B/Beatles,_The/Discography/

Certainly Eric played that solo very similar to the original in the Concert For George, but that doesn't prove anything as he's a guitar god.

Quoted from Mean_Mr_Mustard

George played bass on Drive My Car?

He said so in The Beatles Anthology (2000)

"GEORGE: I played the bassline on 'Drive My Car'. It was like the line from 'Respect' by Otis Redding."

from here: http://www.wingspan.ru/bookseng/ant/08.html