One picture more - preparation for loading the gun. These guides are little bulky, but secure on the shaft. I will make also same smaller guides, probably for second and third guides, in case of loading long and/or thin shaft. For 7 mm shaft, on 30 kg loading effort, one guide should be on every 50 - 60 cm. For small pneumatic like Cressi 70 or similar no guides are necessary. In case on the picture, Cyrano 850 with 7 mm shaft, one guide is sufficient. With Asso 135, two guides would be enough.