Around here this tool was very popular about 5 years ago. Costs about 20 EUR. Still can't beat knowing how to make a few grafts by hand with a knife. Originally this tool was developed for using in nurseries where there are millions of similar sized rootstock and scions. If you're renewing a whole tree, this tool is useless. If you're trying to graft a sleeping bud in the summer, no luck. So while it has it's uses and allows fast factory style grafts, it's hard to beat the diversity of grafts possible by hand and with experience.

BTW I cannot see from the photos, have you wrapped up the grafts?

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