I would go for 67 rather than 37 if you want meaningful results, even then there is no guarantee. Big Y is better offcourse. How did you test before, an SNP pack?
If you want quick and cheap answers testing SNP's at Yseq is also a a solution. Do you have negatives under CTS9219? This would test a lot of SNP's under CTS9219 for a reasonable price: https://www.yseq.net/product_info.ph...ducts_id=45794