Hi guys, Just a quick question about which mould making system i sould use as i have several small moulds to make and im not sure which type of mould would be best, So the items are bonnet vents about 15 cm square however there are extra pieces that direct the airflow these are about 15 cm x 5 cm and have irregular ridges on them, will post pics if i get a minute. So i was wondering if the parts would be too small for uni mould system and the mould putty would be better suited?