Carrying Safefill cylinder in Bailey front locker

Tirril

I am looking to switch to either the red or blue Safefill cylinder in the front locker of a Bailey Unicorn Barcelona (S1 - 2012 model) which has a recessed base to help gas bottles seat correctly during transit. Whilst the dimensions of the locker are generous
enough I am trying establish if the shape of the base on which the cylinders sits accepts the bottles or is a slight modification required. The actual base of the Safefill seems to be different to Calor Lite.