Hi no pictures unfortunately,
Yes i put the bulb on the outlet to the fuel filter until i drew bubble free fuel. Bubble free fuel being vital. The bulb acts as non-return valve so the fuel will spray out the opposite end and air won't be able to get in. As said before PTFE tape is essential to make sure the bulb is sealed to the outlet of the filter to ensure you can draw a vacuum, thus being able to suck the fuel through the line. After 2 starts the engine worked.
Since replacing the fuel filter the engine hasn't cut out once.
A very simple job which could of turned out to be a nightmare without the bulb. That's Indispensable.