An effort started to build a simplified version, the GLO-1A (Gun-launched Orbiter, Version 1A), based on the Martlet-2G. Continued budget pressures, changing public attitudes towards military affairs, negative reviews from the press and other researchers in Canada and a change of government all conspired to ensure that Canadian funding was not renewed in 1967. Bull had been working on a last-ditch effort to launch a Canadian flag into orbit in time for the Canadian Centennial, but nothing came of this plan. Bull returned to his Highwater range, and transferred HARP's assets to a new company. He invoked a clause in the original contract with McGill that required them to return the range to its original natural condition. Faced with hundreds of thousands of dollars in construction costs to wind down a project that could not garner funding, McGill was left with little choice but to trade Bull for title to the Highwater equipment. Setting up a new company, Space Research Corporation (SRC), Bull became an international artillery consultant. Incorporated in both Quebec and Vermont, a number of contracts from both the Canadian and US military research arms helped the company get started.. In the late 1960s, Bull established a space program at Norwich University, in Northfield, Vermont. At SRC Bull continued the development of his high-velocity artillery, adapting the HARP smoothbore into a new "reverse rifled" design where the lands of a conventional rifling were replaced by grooves cut into the barrel to make a slightly larger gun also capable of firing existing ammunition. Normally artillery shells are sealed into the rifling by a driving band of soft metal like copper, which demands that the shell be shaped so that it balances at its widest point, where the band is located. This is not ideal for ballistics, especially supersonically where a higher fineness ratio is desirable. Bull solved this problem by using an additional set of nub "fins" near the front of the shell to keep it centered in the barrel, allowing the driving band to be greatly reduced in size, and located wherever was convenient. Re-shaping the shell for better supersonic performance provided dramatically improved range and accuracy, up to double in both cases, when compared to a similar gun using older-style ammunition. He called the new shell design "Extended Range, Full Bore" (ERFB). Starting in 1975, Bull designed a new gun based on the common US 155/39 M109 howitzer, extending it slightly to 45 calibre through modifications that could be applied to existing weapons, calling the resulting weapon the GC-45 howitzer.