Note 4 - Property and Equipment: Property and equipment Table (Details) - USD ($)	Jan. 31, 2018	Apr. 30, 2017
Details
Office Equipment	$ 70,062	$ 67,091
Auto and Trucks	516,187	446,968
Machinery and Equipment, Gross	5,016,056	5,109,816
Buildings and Improvements, Gross	9,243,773	8,136,080
Construction in Progress, Gross	528,851	815,471
Property, Plant and Equipment, Gross	15,374,929	14,575,426
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(6,924,596)	(6,334,229)
Property and equipment, net	$ 8,450,333	$ 8,241,197