A local group of angel investors has led an effort to raise $1.5 million for a Salina-based developer of technology for the auto collision repair industry. Midwest Venture Alliance was the lead investor on the fundraising project for Matrix, which has invented an electronic measuring system called the Matrix Wand. What's different about this deal is that the investment involved the collaboration of several private-sector angel groups in the state. It serves as an example -- and a model -- of what private-sector investor groups across the state can do when there is a promising company or technology that needs the kind of funding that no single investor group can provide on its own, said Trish Brasted, MVA managing member and chief executive of Wichita Technology Corp. The other angel groups involved in the financing were Mid-America Angels of Lenexa and a newly launched angel group, Women's Capital Connection. ...