Does anyone know of any good sources for learning shuffling with block transfers. I have been reading Marlo's manuscript and he says to push the block with the forefinger. If I try this only on a block of say five cards only the top card and maybe the second and third move over in a spread, unless I push with my finger at the extreme edge of the packet which looks obvious. I have tried using my thumb with better results. Can anyone help please?

I believe Vernon had work on the block transfer, unfortunately I don't remember where I saw it. I use my ring finger to perform the block transfer and have not had any problems with it.
Steve

Dai Vernon, Vernon Chronicles 2, page 37 has a block transfer technique

Darwin Ortiz’s lessons in card mastery has a good description of a block transfer, it’s in the effect Sweating Bullets near the end of the book.

Jonathan Hackett

Thanks for all your help, at the moment my thumb is the most deceptive, so I will probably continue to use that as it works for me, I was just curious after reading Marlo's suggestion of using the forefinger.

I recall that Karl Fulves published material on the subject. Also, Jerry Mentzer published the
concept in one of his Card Cavalcade books.

I made a short video. Is this what you are talking about?
I found moving with forefinger or thumb basically does the same thing.

https://youtu.be/A-Ud1JfeNvs

Thanks for your advice, Tom. Simon Card thanks very much for that, that looks exactly what I was talking about, from the written description I interpreted it that the forefingers would still be curled on top of the cards and pushing or going to the extreme edges... I have been having quite good results from using my thumb although it looks as if the forefinger method may offer a bit more cover at the front. I will experiment with this, thanks again

Another thing I found helpful is that shuffling a small block right below the cards to be transferred can help you easily kick the top cards to the correct position either by the thumb or the forefinger.